Hr6 Ash Lao, onslaught via belly should net you kill within door way of 5. Throw in some power pills and seeds for extra "muahahhahaha!"

Spend all time you can on belly, save bombs for head as it enters,  Start hitting head till belly is in range...attack it.  When lao starts go next area, get few lv3 slams on legs. Use Bali as lao enters area, and get ur butt down there to start pounding that belly! 

Save dragonator for last min or so if battle is lasting that long. It'll probaly get you your kill.

If you got Aka bow, throw in loading to get lv4 rapid and follow behind his left leg, when he drops, go aim for his back. rinse and repeat, fort probaly take a beating.

Even promisusse or w/e fudge they named it, III bow can kill hr6 ash lao, just put lv3 perice thru leg and stomache.