W.A.R.B.O.T. Missiles x 10 Thermal Stones + 2 Bone Armors + 60% of 1 Star Caller's Staff.

[Cruvimaster]

Strategy:

In the first missile attack, using 2 bone armors works consistently (the boss doesn't attack you in this phase).

In the next phases, I moved to the location with 10 thermal stones, and it was enough to solve the missile problem.

I used a single Star Caller's Staff and had 40% left.

The character is the game's default (Wilson). I forgot to add the mod that shows the boss's damage and health.

[Ridley]

That slam attack is gnarly. At least this method cuts down on the thermal stones/dwarf stars.

[Cruvimaster]

8 minutes ago, Ridley said:

That slam attack is gnarly. At least this method cuts down on the thermal stones/dwarf stars.

I'm still going to do the test, because I think leaving the stones further apart will need less.