[catabur]

Testing it out with my 81 WIL mage with maxed Wretched Oil, I did:
13 RESISTED & 28 damage against a 58 DEF and 11 RES Red Gorgon.
24 & 24 damage against a 53 DEF and 3 RES Hyattr.
32 & 36 BOTH RESISTED damage against an 18 DEF and 43 RES Redtail.
47 & 51 damage against a 20 DEF and 65 RES Corrupter.

I feel like there's a pattern here.