Tbh when I decide to go for IFB, Vitalis probably wouldn't even be my limiting factor.
Plenty of other bosses are so much aids, it makes me wonder why I even do them. I rather grind Vitalis than grind Ellie, Corp Puppy, both Kalphites or Nexterminator =.= Imagine if NONE of the other bosses have thresholds - be thankful these drops even have thresholds in the first place.