You should be able to use your creature and summons in this encounter, or at least could in D2:ED.
Unskippable cutscenes are annoying.
If you are a high enough level to reasonably fight General Raze, then his summoned armours actually help you, as they can interfere with his ability to run for a healing chamber. I don't know if they are a serious threat after the combat rebalance (they were not in D2:ED).
The one-hit kill is a bug... wasn't it fixed in the patch, but if the problem occurred before installing the patch it was written into the save, and you needed to email the save to Larian to correct?
