I don't like throwing Wimps into a fight since they mostly go down, even with power armor or the best armor. They go down fast.
I tend to use a large variety of weapons and weapon ranges. My most fragile pawns generally get snipers and sit in the back (my basic defensive setup is a large room with walls and sandbags in a "V" shape, with the entrance to the room at the wide opening of the "V"....this means my pawns can effectively stand behind one another, but they won't hit each other because the bullets are angling inwards while the defensive line angles outwards. It also means that the pawns in the back are VERY rarely targeted, so wimps on the back lines would be feasible.
That being said, I imagine i could also use them as combat runners, the same way I use my nonviolent pawns. I give them a shield belt and sit them JUST behind the first safe door from the firefight. Those pawns' jobs are to to run out and rescue downed pawns, run out and put out fires, and if I'm feeling really brazen, send them out to capture downed attackers.