Okay with help from this forum I was able to dismiss Diamond Gargoyles. Next question. Best way to defeat Oozes? Thank you
Fireballs on oozes? No way! Sparks, sparks, and more sparks. Especially if they're downhill from you in a tunnel every spark will hit an ooze. Sparks is even a great spell at super high level if you're at point blank range, since its super mana efficient. Similar high damage efficiency spells include the other multiple shot spells, like fire blast and shrapmetal. Just be toe to toe for it to work!
Also weapons with elemental damage bonuses _can_ hurt oozes. It won't show a damage number but you'll see a little explosion on the ooze. This is slow though.