[Lord]

I may be giving away some spoilers here, but I ask that any replies have no spoilers in them for me.

I got to Durlag's Tower yesterday and was given the wardstone to continue on. The Demonknight came, attacked with 2 massive fireballs, and then left. I went down and I believe down again till I met an adventurer that was part of the party of Delton (sp??), who I am supposed to rescue. Anyway, I moved on to the part with the watchers that need to be awakened, and I've realized that I can't do much about traps. In my party I have:

PC Ranger: Level 7, 101 HP.
Minsc: Level 7, 74 HP.
Imoen: Level 8, 58 HP.
Dynaheir: Level 8, 45 HP.
Jaheira: Level 6 Fighter/7 Druid, 63 HP. She is close to leveling up in fighter.
Khalid: Level 7, 86 HP.

Imoen has 100% Open Locks, 100% Stealth, 40% Find/disarm traps, and 25% pick pockets. She will level up in 7,000 XP for me to boost her find/disarm traps up to 60%, but right now, she can't really find many traps, and even if she does, she can't disarm them. I have a few potions of power, but drinking them will only boost it up to 46%, and the potions are not cumulative with one another. I've noticed that most of the traps are fire traps, but I have no more fire resistance potions left, although Jaheira can cast some from levels 2 and 3 of her Druid Spells. The traps are shutting down my party, and although I am yet to die, I have come very close, close as in having my PC down to 2 or 3 HP while being poisoned, only to be saved just in time by an elixer. I stocked up on elixers and potions of healing, Jaheira can cast 6 heals, and my PC can cast 2 heals. It's not enough though, cuz I'm getting beaten terribly by these traps.
I'm experienced in running this party as I've used this party twice before (I'm just experiencing them through ToTSC for the first time), so any help (with out spoilers about Durlag's Tower) is appreciated on how to pass these traps.