BLM in Leviathan...

[blackermage]

Whoever told you 350+ without thundercloud or firestarter is ridiculous, esp if phases aren't getting skipped. Aside from the general BLM advice of moving just enough to dodge the jumps while still dpsing spumes, here are a few tips that might help.

1) Aetherial Manipulation during slam to your closest target. You'll just teleport to them and won't get knocked pushed to the end of the raft.
2) Blizz3 -> T2 head, T2 tail -> F3. Basically adding in an extra thunder onto the tail for more TS procs when you switch between AF3 and UI3.
3) If the tank(s) can pull the double adds together, and/or bring it to the head/tail, try to get some flares in.
4) During spumes, you might want to put T2 on a few of them. If you get a TS proc make sure you use it on a spume that doesn't have a thunder on them and has reasonable amounts of life left.
5) (Just for fun/Epeen) Flare the blue balls (that explode after a while) that the tank takes a few times. Make sure you pop quelling though!

@Vivi: My understanding of OP is that someone else told him he should be getting 350+, which is absurd at ilvl91 even if he was to do #5 above.