[fungalreason]

Regarding the blood summons issue: Perhaps the best thing to do is not decrease the cost, but address the mage-time issue instead?

Maybe try changing it to summon ~3 (or whatever number is deemed appropriate) at cost that's higher per unit than the mass summons. That way it's feasible to build up a moderate number of them early game without destroying your research capabilities?

Late game people with blood mages of the appropriate paths for the mass summons would still get benefit out of them. Although I think those could probably be cheaper and/or summon more units than they do currently, given the difficulty in obtaining those paths.