Ranger is probably the strongest in the game right now with how Warfare adds to their damage all the time and that you can go pure damage and still get turns because of the combat turn changes. They have the least risk for the amount of reward they can reap.
Get 1 Poly (for cloak just in case you need it), some huntsman (so you can learn skills) and then max warfare first for highest damage before moving on to huntsman and ranged. Get 1 into Pyro if you want cleared mind and Haste.
If you want to play warfare necro, just get all the warfare skill first and necro will just be there for some passive life stealth (and later, the death wish steroid with necro). The problem with warfare necro is that if you go str, your weapon deals a lot of damage but necro won't and if you go for staff, you deal mixed magical and physical damage.
So if you want warfare necro to work, go int and use battle staff. Get a good ranger and another warrior to deal some good physical damage so you can finish off foes with your necromancy while you break the magic shield for your other mage with your staff and magical spell.
