Geared in 346 you should have no problems with first 2 in Blackwing's Descent, maybe a couple of wipes, but if everyone reads tactics and do what they should - it's a piece of cake. Conclave is easy too. Halfus in BoT might be a little tricky, depends on what dragons you get to deal with, but the next boss is one of the easiest if you know what you're doing. I'd suggest you also try Atramedes.
Oh and clean thrash once in a while, we got more epics from random mobs than from bosses lol.