Hey guys i got all the achevements but one....the master bomber one...i think ive tried every single bomb i could find in the game...the archers bomb trap...and those fire vases that explode...and have gotten more than100 kills for both...is there any other?...

First caves or missions or whatever are the best places to do get that achievement. Get as many enemies as you can to follow you and stand next to an exploding vase for a while so all the enemies get near and hit that vase so all those weak enemies die on one hit.

just hit the vases that explode and pray you don't kill the monster before the vase kills it....I gave up that achievement though, only 1 that kept me from 200/200 =\