Drg/whm and pld/nin With haste and decent gear you can really hold hate and that duo will really work.
No PLD is going to meaningfully hold hate off a DRG against stabby-weak monsters when the wyvern is doing the healing. The PLD will struggle just to hold his share of hate.
And, to be clear, whatever his subjob, the PLD shouldn't be healing unless he's just looking to burn off excess mp.
To the Op, though: Abyssea EXP is just SO VERY MUCH better than what you'll get duoing (like, seriously, potentially five to ten times the EXP) that it's just short of wasting your time to even bother. When you have Abyssea access in a month, one solid trip there will give you as much EXP as the entire month of duoing. Do it anyway if it's fun, of course, but if there are any other things you two would rather be doing in the game, you might as well do that and just just wait until you have access to the giant FOUNTAINS of EXP that you'll get in a month.