Jerusalem Final Boss Fight *Will contain spoilers*

[Lykurgos]

So, after 3 runs which failed earlier, I reached what I expect is the final boss fight at Jerusalem for the first time.

I failed hard.

It looks like the fight requires at minimum, use of 9 mana, to cast the spell that removes invulnerability from pylons on three separate pylons. In this fight, and the previous 'level boss' fight that precedes it, each killed abomination provides a mana point. That seems to mean that it is necessary to kill at least 4 abominations, probably more, during the fight in order to make the pylons vulnerable to being damaged.

What overwhelmed my party was the combination of a new spawn every second enemy turn, and heavy debuffing from one of the three pylons that persisted for two of my turns. I managed to make just one pylon vulnerable before losing all my characters. I arrived to the fight will full health, equipped relics, and all armour and weapons advanced to Tier III, but only 2 mana.

An obvious goal for my next attempt is to arrive to the fight with 5 mana, so I can immediately cast the essential 3 mana spell once right away, and soon again a second time.

Still, this fight looks incredibly tough. Have you reached it yet? Have you failed / succeeded? Welcoming any experience sharing and tips!

[MarkoP]

There are a total of 10 pylon types, and each time you get to Jerusalem, 3 are randomly chosen for the fight. It's possible some combinations of pylons are incredibly annoying or harder than others, as part of the roguelite design. Keep at it!

[Lykurgos]

Interesting, nice to know. It seems like you are fully complying with the rule that You Must Construct Additional Pylons :-)

[Lykurgos]

Fifth run, second time at Jerusalem, win! A few generic things that helped were -

After the Holy Grail was converted into a 'group effect' and spell, equipping the hero that previously had that with a new relic

Going in with 5 mana, achieved via 'topping up' back to 5 within the preceding single pylon fight

Leaving a pylon that spawned melee abominations until last, since these are easier to control than ranged attack abominations, and can be trained to cluster round their pylon, enabling use of the grail spell to hit both the pylon and one or more abominations

Using a full stun (no action) ability on a pylon as often as possible, so that it does not get a round of actions to buff / debuff / summon

[MarkoP]

Congrats!

[Stepfan]

Some small tricks I used might help with last battle.
There is a spell stasis that helps a lot with the last battle.You need to kill the pylons fast by 3rd turn maximum 4th turn 2 pylons out of 3 need to be dead. If not you will be overwhelmed. After that focus on killing last pylon and you win.