All really nice concepts! I can say what I like about each of them, but I don't know how well those elements would go together.. I like the piercings and the mask from 2, the body and leaf head dress from 4. I also dig all of the beard designs so I can't help you there!
Alternative bomb ideas! I got a little bored so I didn't finish painting them but you get the idea :p I still like the frog best but I thought I should just try some other stuff.