Well, I already found a great deck for farming the raid.

[Obsidian Dragoon]

Took me some time to find but it's well worth it. Mostly F2P deck too.

Abuses the hell out of Marik's skill, the no tribute mechanic and the fact Egyptian Gods deal 5x damage.

Marik
Power of the Tributed

2x Winged Dragon of Ra
3x Blue-Eyes White Dragon
3x Subterror Behemoth Ultramafus
3x Subterror Behemoth Speleogeist
3x Subterror Behemoth Stalagmo

2x Dark World Dealings
3x Double Summon

1x Subterror Final Battle

Basically, you summon out your Subterrors for the tributes (the weakest ATK among them is 2800). Blue Eyes is there mostly as alternative damage source.

Speleogist is a good card in this deck because he can force a monster into attack with 0 ATK, meaning free damage (especially if you do this right before summoning Ra). Double Summon helps you get Ra or other big monsters out. Dark World Dealings helps you go through your deck. Subterror Final Battle is mostly there for setup purposes if you happen to draw it. Stalagmo helps you draw through your deck until you get Ra.

When you bring out Ra, it will have a minimum of 8400 ATK from Marik's skill. If you haven't taken a hit to your LP yet, you can boost Ra another 3900 and, if you set up the enemy's field with Speleogist, that's a grand total of 61,500 battle damage (assuming minimum ATK from the skill).

Update:

Found an edited version that is still consistent but MUCH better for big damage.

Marik
Power of the Tributed

2x Winged Dragon of Ra
3x Guardian Angel Joan
3x Subterror Behemoth Ultramafus
3x Subterror Behemoth Speleogeist
3x Subterror Behemoth Stalagmo
1x Blue-Eyes White Dragon

2x Dark World Dealings
3x Double Summon

Ultra is fodder. Only meant to be an extra tribute or for Stalagmo's effect.
Joan is for attacking each monster to help beef your life points while you're waiting to draw Ra
Speleogeist is for setting up the field

Now, using this deck, and paired with the EX skill, I dealt almost 2 million damage with a single hit. No bull whatsoever.

https://twitter.com/ObsidianDragun/status/1263741568470659076?s=20

Included is the screenshot for proof.

[Theuone]

How do you have 2 Ra's? Coulda sworn we are only able to get one each.

[Obsidian Dragoon]

Originally posted by Theuone:

How do you have 2 Ra's? Coulda sworn we are only able to get one each.

Alternate Artwork Phoenix Mode is my second copy.

[Orochi Samurai]

Originally posted by Theuone:

How do you have 2 Ra's? Coulda sworn we are only able to get one each.

Yup, we got a second as part of an event, a pretty sweet alt art too.

[MancakeBR]

Alternatively, you could try playing Aromages with Ra, though, you would need to make sure to get Ra relatively early so you're not sitting there doing jack all.

[Obsidian Dragoon]

Originally posted by WM1Pyro:

Alternatively, you could try playing Aromages with Ra, though, you would need to make sure to get Ra relatively early so you're not sitting there doing jack all.

Yeah, kinda hard to get that with Aromages since they can't summon quite as effectively as subterrors nor can they as easily set up the field. Also, Power of the Tributed is less effective with Aromages since their monsters are considerably weaker and take longer to get out onto the field to be used as tribute fodder.

[MancakeBR]

Originally posted by Busty Demoness:

Originally posted by WM1Pyro:

Alternatively, you could try playing Aromages with Ra, though, you would need to make sure to get Ra relatively early so you're not sitting there doing jack all.

Yeah, kinda hard to get that with Aromages since they can't summon quite as effectively as subterrors nor can they as easily set up the field. Also, Power of the Tributed is less effective with Aromages since their monsters are considerably weaker and take longer to get out onto the field to be used as tribute fodder.

I just realized, Aromages wouldn't work anyways since the Raid Duel has more LP in general. Unless Rainbow Life is in the game and X-Saber Ragigura, then you can loop almost infinitely to out gain those LP.

[Skilled Blue Magician]

I want to try god cards for this but I don't know of any methods to make it worth while.
My current event deck is really basic with 3x DM, 3x DMG, and 3x BEWD, and then field skill and ATK boost spells like equips. I ended up playing assist duels half of my day, so I'm at seven million points right now. Marik is a good idea but I would need to find something else to use because I don't have the Subterrors or 3x Double Summons.

[Obsidian Dragoon]

Originally posted by Skilled Blue Magician:

I want to try god cards for this but I don't know of any methods to make it worth while.
My current event deck is really basic with 3x DM, 3x DMG, and 3x BEWD, and then field skill and ATK boost spells like equips. I ended up playing assist duels half of my day, so I'm at seven million points right now. Marik is a good idea but I would need to find something else to use because I don't have the Subterrors or 3x Double Summons.

All of the Subterror monster cards I listed are N or R rarity, so they aren't hard to obtain.
Double Summon is mostly for convenience in getting out Ra sooner.
You can replace the S/T cards you don't have with Magical Mallet or Reload, giving you the option to refresh your hand.

I wonder how well it would auto duel, though. Something to test.

[Obsidian Dragoon]

Updated the deck with some interesting progress.

Because the EX skill can stack with itself, Egyptian Gods can potentially deal 125 times the damage in a single turn.

Screenshot is included in the twitter post I linked.

[e-dood]

Lucky for me that I wanted to make a Subterror deck recently.

[Theuone]

Originally posted by Orochi Samurai:

Originally posted by Theuone:

How do you have 2 Ra's? Coulda sworn we are only able to get one each.

Yup, we got a second as part of an event, a pretty sweet alt art too.

Ohhh, right.

On that note, am I missing something or can we not use DS to summon the trio? I tried to summon Slifer (with Obelisk in a Blue-Eyes Tyrant Wing deck) without tributes, but it wouldnt let me.

[ToolsOfTrypticon]

Originally posted by Theuone:

Originally posted by Orochi Samurai:

Yup, we got a second as part of an event, a pretty sweet alt art too.

Ohhh, right.

On that note, am I missing something or can we not use DS to summon the trio? I tried to summon Slifer (with Obelisk in a Blue-Eyes Tyrant Wing deck) without tributes, but it wouldnt let me.

The Gods still require material for their tribute summon. My guess is because they are on a different tribute summoning mechanic than your average high level monster. Their condition must prevent a dimension summon from occurring. That and Konami probably didn't want to make the farms any easier, but with Konami you never know.

[Tunnel Sharks Rule!!!]

Originally posted by ToolsOfTrypticon:

Originally posted by Theuone:

Ohhh, right.

On that note, am I missing something or can we not use DS to summon the trio? I tried to summon Slifer (with Obelisk in a Blue-Eyes Tyrant Wing deck) without tributes, but it wouldnt let me.

The Gods still require material for their tribute summon. My guess is because they are on a different tribute summoning mechanic than your average high level monster. Their condition must prevent a dimension summon from occurring. That and Konami probably didn't want to make the farms any easier, but with Konami you never know.

It's because the cards specifically say "Requires 3 Tributes to Normal Summon (cannot be Normal Set)."

[Obsidian Dragoon]

Originally posted by Theuone:

Originally posted by Orochi Samurai:

Yup, we got a second as part of an event, a pretty sweet alt art too.

Ohhh, right.

On that note, am I missing something or can we not use DS to summon the trio? I tried to summon Slifer (with Obelisk in a Blue-Eyes Tyrant Wing deck) without tributes, but it wouldnt let me.

As Moo-Neko said, all 3 have "Requires 3 tributes to be Normal Summoned (cannot be Normal Set)."

[Skilled Blue Magician]

I've been out of gems from Selection Boxes and stuff. I only have one Dark Magic Twin Burst and it is the key to my current boost strategy, so I need to get three of those. Back-Up Rider and Dark Magic Expanded are what I have, although I could throw in more Dark Magic Expanded and a Spellbook of Power. I use these to boost up Dark Magician Girls and then I use Dark Magic Twin Burst. After that, I equip any final Power of the Guardian or Mage Power I have in hand to Dark Magican. After that, I use the 5x twice in a row. This gives me over one million damage. For safety reasons, I have 2 Magical Mallet and 2 Shard of Greed. I also have Big Bang Shot, Thousand Knives, and Nobleman of Crossout, but I'm thinking of dropping two of these.

If you're getting over two million damage with a god card then I should really see what options I can run with the cards I have. I only started playing Duel Links again for a month or so after taking a year off from the game because it was taking up too much time.