Leveling through Don Mheg is horrible for the last boss. Specifically for the balancing act part. Thancred actually cheats and uses a space closer at the first 'corner' (it actually looks and sounds like a ninjas teleport move and considering his origins it might actually be that), but Alphinaud and Minfillia walk very slowly, leaving it on you to haul ass to the boss and hope you and Thancred are enough for his dps check. If you fall twice its basically a wipe. Maybe even if you fall once (I barely scraped by in time). Last time I tried it I was BLM and aetherial manip didnt work. Haven't tried teleporting to leylines. Has anyone tried gap closers for this part because I don't actually mind leveling the Trusts but that part of the dungeon is especially hair-pulling.