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Okay, so this isn't one of those games where you can just grab a bunch of random stuff right away; there's a decent risk of getting your butt kicked. Take a mage from the start (there are four available). You can also take a thief, but as far as I remember, he doesn't really do much useful, and he's completely useless in combat. Warrior or berserker, it's up to you, but you'll definitely need one of them. The warrior hits more accurately, can stun, and has other abilities; he's more reliable. On the other hand, the berserker attacks multiple times and can deal a lot of damage, enrages, and deals increased damage; he's a decent guy, and I beat the game with one. Then, take a cleric or paladin to heal everyone. The cleric heals more and has various abilities, while the paladin attacks with his hands and sometimes casts something; I don't know which is better, probably the cleric. But I played with a paladin. Instead of the thief, you can take a ranger/tracker, I don't remember what he's called there. Or you can take a monk, but he doesn't do anything at the beginning, and I didn't see him in the later stages of the game, so it's at your own risk. Later, as you progress through the game, you can add another mage and, I think, a warrior to your party; I don't remember exactly, but you'll definitely have six people.
It's quite difficult to resurrect a dead character, so I advise you not to die, especially before you bring the staff to the blind priest.