Mass-produced Reanimating Priests: Exploit?

[Nikelaos]

i really don't see the problem here, the freespawn undead are utter chaff and can be handled very easily with the usual undead counters. There are many more effective tactics which can be employed much earlier in the game.

Just to chuck in one such strat which could tear right through this 'Exploit'.

10 fire+water blessed hydras (can only be blessed playing middle age pythium) under the influence of 'gift of flight'. Ah watch the undead dissolve under 180 blazing poison bites upon their rearmost troops and commanders, YES there will be blood.