Ah my bad, read that wrong. I know that Cleric + Monk is pretty good. If the monk is good, you'll only have to fight 1 mob at a time, and monks have the best upfront DPS of melee (barring epic'd warriors). As a warrior, I've done a lot of duoing with Clerics. DPS is fucking slow, but you can kill many things. Once the WAR gets epics and has a good haste item, they are about equal to a monk in terms of DPS and require less healing. Warrior can also get a Melodious Truncheon to proc tepid deeds on enemies! However, warrior, unless halfling, have absolutely no capacity to control their pulls, so it'll be up to the CLR to calm enemies for the pull (better have some CHA gear).

Additionally, I have seen a Cleric + Mage duo absolutely wreck seafury island. Get a pet up with DS, Cleric roots mobs next to pet and keeps it up if need be. Pretty awesome to see, although they took all my mobs.

The main thing holding Clerics back from duoing is that they lack offensive buffs/debuffs. No hastes or slows, no mana-efficient DoTs. Pretty much unless you're fighting undead, the cleric is stuck medding and healing the DPS. And unless the DPS is also a good tank, the cleric will be burning all their mana trying to keep them up.

That being said, at high levels i have done a lot of cool stuff with my cleric friend.

ITT: Enchanters are to duo comps as cranberries are to juice blends.

cleric + mage fire pet is pretty beast. Mage fire pet is some of the best dps in game til 50+ even counting enchanter charm pets, just because the fir epet has HUGE damage shield.

Cleric adds the missing ingredients... heal and root. Get torch of alna to focus fire pet, summon max level pet, give summon weaps and haste, buff to hell, sit back and high five