Couple looking for good Duo comp

[Werlop]

War lacks enough dps imo. Shaman and druids have dps but won't keep him alive efficiently (lots of boring med time) if at all, and war/cleric kills very slowly.

Monk/shaman is a very solid build and a staple. I recommend it if you don't want to have 2 casters- this duo can go far.

Enchanter/mage is risky... I can't comment on it at lower levels, but at higher levels you'll want to make a healer friend.
Alternative composition: Enchanter/necro. You trade some pet dps for dots, better mana dumps in a pinch, and efficient healing. If you get bored of dungeon crawls, you can mix things up with a little fear kiting.

mage/mage- good fun. Mages are not a very gear-dependent class. Foci are good, extra mana is good, but the gear that you can reasonably get without twinking will not drastically change your character. Just do round robin on drops if you don't want to roll.

Enchanter/shaman is not a bad idea either, especially at mid-high levels where the malo and tash lines combine to create long duration charms.