I thought all ENMs already had a level cap on them (just some cap at 75) hence why buffs are lost upon entry. Think KS99s, Bahamut fights, Ark Angels ...
Beat the Giddeus BCNM 30 on our first try. We had a SAM, DRG, and WHM. SAM brought 3 hi-potions, I (WHM) brought 2 Yagudo Drinks. We didn't set any records, but we won without much problem. I did have to use Benediction, but I think one more Yagudo drink would've covered that.
We got crappy