0.6.0: Boss rebalancing doesn't apply to boss Sorceresses

[JayH2971]

Regarding commit https://github.com/sleepeybunney/maelstrom/commit/a7834bfb29f198cc30737a8b12a354adefa485f3

I'm fighting the Sorceresses at the end of the Desert Prison, and the rebalancing isn't applying to the multi-Sorceresses. They're level 45 and using their spells at normal power (500-ish per shot).

Reference seed 2029485070