Low HP is very much part of the mist elf experience. You really need to get your elemental resistances up ASAP to avoid getting screwed over. I recommend wearing the black torc for early -Fire and -Elec. You can buy a set of keys to deal with door traps, or get the appropriate skills. Or just tunnel around them with a pickaxe.
Hardy is great for mist elves. If you take all three talents you get a flat 18 HP bonus, which is like 10 levels worth of HP for a mist elf. Tough is worthless.
Hoping to win with every class, doomed. Archer, Barbarian, Bard, Beastfighter, Druid, Elementalist, Farmer, Fighter, Monk, and ULE Priest down.