Angels as a race.

In short, we leave the angels under Elrath's control.
Better help me think through the building.

I feel that this building should somehow be linked to the potential ability of angels to resurrect (let the archstrategos possess an ability similar to Necromancers - raising a portion of killed angels after the battle specifically as those angelic units that fell during the fight), or more precisely, increase the percentage or number of resurrected creatures.

Added after 4 minutes

Interesting, interesting, but 2 remarks
1. There is some imbalance:) a little, but it's there. For the level 7, for example:)

Explain why you are not satisfied with level 7?