Adds .1 to fTP of WS 1st hit(being the strongest hit) on Evis which is 1.0 and 5 hit thats a 10% dmg increase to the 1st hit and it also adds ACC to all hits of the WS. So it'll out perform both other options and is usable my all jobs.
Evisceration's first it is equally strong as all of its other hits, and even if it was the "strongest hit" that would be because it has higher fTP and would benefit less from Soil Belt's fTP+0.1.
Pipilaka for PK, Cuchulain's for DE and Evisc when you don't need Acc. Anguinus for both when you do need Acc.