After playing a bit today, I have to say Stoneskin on Topaz Carby is pretty sweet. His high base HP gives it a tad more oomph. I can only imagine it get's better when a CNJ with the upgrade casts it later.

Had a run earlier where we were rushing it a bit, trying to beat the maint downtime, and were doing that Slime/Bomb fight in copperbell. Tank died early so I busted out Topaz and had him keep the slimes busy while the 2nd DPS camped the fireman spriggan. Carby ate that Bomb's Self Destruct like it was candy and kept going. Good times.