What about fragbubble?! I dunno if it's too basic, but it's one I use all the time. Someone is coming at me, and I have a frag and a bubble shield. I place the bubble shield down, and get towards the back. The enemy enters the shield, I throw my frag and leave. He loses his shield, and because of the frag, the bubble also goes down, leaving him open and shieldless.
ok ive havent been looking for more this summer really, but i hope to start. does anyone have any things that i should try out to see if it does something?