Must-have cards for Warrior deck?

[Zarvanis]

I've been building off of the Legendary Warriors deck, and so far my deck is solid enough that I've been stomping in low-level play. I've been buying packs that have UR or SR Warriors that look useful, but I'm not sure if there are cards that I absolutely must have that I don't know about.

[Tarlac9]

I have Knight Day Grepher which is a gemini monster and during the end phase with him on the field I can retrieve back an equip card I had lost to the graveyard.
Also have Freed The Matchless General who negates Spell cards that target it and destroys them. Also during Draw phase you can instead draw 1 lvl 4 or lower Warrior-Type monster from deck to hand to quickly get monsters you might want.
Also the spell card Assault Armor which can only be used with one monster on the field but you can summon after it anyways, also activate the card again so the equipped monster can attack twice.
Just a few reccomendations of cards that have helped me out quite a bit.

[Sparse Dunes]

Immortal Bushi, since he has a revival effect if you have warrior type monsters in your GY. So you can use its effect(if you have no monster on the field) to Special Summon to then tribute it into Freed the Matchless General.

[Vintage Dev95]

If your really into warriors 6 sams is the best option in game atm but once you get outa the lower rankings the deck just dosent keep up theres very few token 6 sam decks that go far they will probally start losing spark mid platinum. So my advise would be drop it and spend gems on a better deck while your ahead that is if you care about hitting KoG every month for the 200 gems.

[Firewalk]

BOXer is great if your deck runs lots of EARTH warriors. But even if it doesn't, he protects himself with his counters.

[El Birri]

i have this custom warrior deck:

https://imgur.com/BtSV4vV

[Taweret]

axe raider! lol jk.
yeah boxer is a good warrior card but six samurai seems to be best option atm, other good warrior card is cyber gymnast you get him as leveling reward and exiled force ur from neo impact,
amazoness swords woman is technically a warrior, elemental hero wildheart decent warrior, i personally like booster blader, fun card. good base for warrior deck might be structure one it will work best with mausoleum cuz tribute summons. pretty good card in structure deck is assault armor it allow your warrior to attack two times in a turn making ik potentially otk.

[~ Fabulous ~]

amazoness swords women, you can't go wrong with her ;) best warrior card out there

[Taweret]

it might interest you, newly added warrior kog deck:
http://duellinks.gamea.co/file/content/umi92hxs/zn9fubr5/538031/ac4fea7a7e6ebcd2c37f298b100a9958692b1f48_500.jpg
skill: Last Gamble!