If the board pairs the turn cards on each hand (best card for me basically) then I'll fire again only if I have AJ+ on first hand and A8+ (maybe Q8+) on second hand. I'll also bet a little larger on turn with those. All subject to change, though, since I'm speculating without giving it much thought.
Problem with tripling the first hand is really the only hand I beat on the river is QJ. Second hand I think he calls three barrels with any 8 or 6.