Actually, that's a very balanced party. Two healers, two mages, two thieves, two archers and three tanks. Although several of these might seem weak early on, good equipment will make all the difference. Once your monk has enough levels, you might not even need the rest except to Breach down a mage's defenses. Try using the Haste spell before large battles, and don't be afraid to use the potions- there's plenty more where those came from.
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