I'd say thief is probably the weakest class. Toughest pairings are probably high elf, mist elf, or ratling thief.
Farmers are quite good, actually, especially with the buffs to gardening and fletchery. I'd definitely put them above merchants, mindcrafters, blacksmiths, thieves. Maybe even above fighters and most bards.
Hurthlings are probably the second-best race behind drakes, though I think a case could be made for them being the best race.
Hoping to win with every class, doomed. Archer, Barbarian, Bard, Beastfighter, Druid, Elementalist, Farmer, Fighter, Monk, and ULE Priest down.