Upgraded ice staff is your best friend. Even if you cant get it done by the 1st panzer round the boomhilda should see you through it.

Heres a tip. If you're stuggling with panzers after building the staff you can run to the bottom of the fire tunnel, jump behind the speakers at the bottom in the alcove and keep the blizzard from the staff active. The panzers die before you even see them. Come to think of it iirc going behind the speakers causes a confusion glitch for panzers and they go down to the bottom of the tunnel and just stand there . Its been a few years since i played origins but that maybe worth looking up. I think thats a thing