Ermor vs Pythium Hydras, help!

[Viajero]

Noob here so bear with me...I have found one thread on how to counter hydras here:

http://forum.shrapnelgames.com/showt...=counter+hydra

But maybe some of you have additional info or experiences. The consensus seems to be fire rate vs fireppower, i.e. lots of archers/slingers.

What about defeating MA Pythium hydras from an MA Ermor point of view at around turn 15-20?

1- Shadow Vestal are ethereal plus undead (not affected by posion), so I would think they could be a good match for hydras? no?
2- Magic-wise what are the best hydra counters at around turn 15-20 for Ermor?

any other general tips to have Ermor beat hydras at the early stages of the game?

Thanks!