
Just my 2 cents about making melee weapons more worthwhile. Reading the challenges right now just screams bows or magic or both.
edit:
to elaborate on my point:
True Thief: Dex is a great attribute for thieves, and incidentally, for archers, too.
True Mage: magic is just broken (if we include invisibility)
True Ranger: explicitly asks for bows
True Healer: magic/alch
Journeymaster: magic required in practice if not in theory
Untouchable: substantially easier for a ranged character
Immaculate: virtually impossible not to get diseased once for a melee char