I would pair a wizard, rogue, or bard with pally.
The first 2 could maximize DPS and leverage pally's ability to hold agro while they blow up mobs (presumably more effective than a mage could).
Bard just because it brings a fun toolkit although maybe save that one for a non-lull class duo since bard's can lull too. Regen/mana song, ability to fear and charm kite, better puller, has some additional CC abilities. Can haste and DS, can slow the mobs.
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