Duo'd this with a friend of mine as DRG/WHMs. Pretty effortless with food and drinks. We did it twice in a row. The only thing is if you don't finish it off fast enough you'll lose the wyvern to the Poison. And once the pet's gone, so is your Healing Breath II/III. Not having Spirit Link is probably just as well, as you can't afford to take the HP dive. It was easier than I expected, and very intense.
Gearwise, we went for DEF, except my friend used Bone Earrings and Courage Rings, I went with HQ Energy Earrings and HQ Stamina Rings. Defense food, yagudo drinks and Pear au Laits. I used a Hi-Potion per fight, my friend used an average of 2-3, but then his wyvern didn't have Healing Breath III, but II.
Hope this helps, I do encourage other Dragoons to try this. You can bring in a third and make it a serious blast.