Thanks everyone for the tips!

We have an ast/sch combo, in a9s the ast does the adds and the sch does the healing although I get regens from the ast periodically.

I've been doing clears in RF, as has the SCH, and when we met back up as a group after christmas I found that my hp was far less... wobbly. I didn't have any issues dumping halone completely (although I made our SCH cry) and I've been switching to SwO after first adds, hopping back in for scrapline. Probably as we get more used to the fight I'll be able to switch sooner.

(I do keep poking the blm about quelling, and I'm levelling WAR, because so far on a10s prog we don't have the dps for the steamroller even with a NIN subbing for our drg, and having a more reasonable group comp would help with that, I think)