Man you really dont get it...

You cannot herd a fire sorc. You cant herd someone in a defensive mode!

There wouldnt be 1 hydra. It would be 1-5 hydra.
Thats not with what sorc kill... Hydra are merly there to help out controling the field. Fireball does the killing did you read any of the post or you just see fire and say "pattern, ice own, offensive fire sorc!"

Fire sorc are not offensive therefore cannot be herded. You find their pattern ? Fine, BRAVO! What is it gonna do to help you ? You wont be able to get near them as when you get close to same screen they are already teleporting away while you are about to land in a field of hydra.

As far as i remember sorc do not have time stop ability or shit like that. You cant just teleport next to a firesorc while it just sit there hoping they can shove the staff up their ass a little more while they wait for you to cast frozen orb.

You cannot kill what you cannot hit.