I like to go to Cuba to get my flytraps. I was getting flytraps today, and with each respawn it went to a lower level, so my 3rd flytrap was only a level 9
Anyway on Cuba, you can start killing the fly trap, die, go to jail, and return to the flytrap where you left off. I remember going to jail about 6 times to get my first flytrap task completed.
As for the assasins, I think they're all pretty high level, take people with you to help fight, or someone with good voodoo for healing
I would be happy to attack for you if we're ever on at the same time