You would probably get more responses from the ToB forum, but I will try to help.
S
P
O
I
L
E
R
First, kill the air monsters. A key is on one of their bodies. (set air on low) Next, Go to the slime room. Once again, the key is on the body of one of them. Use the air(on high) to blow the gas into the Ice chamber before attempting to defeat the ice people. Kill the Ice people, ge the key, and turn off the air, so the gas will leave the room. Next, lure the fire guys into the ice room.
How's that?
------------------
Devoted member of the
Ironworks
Loyal guardian of the
OHF
Member of the
Ancients' club