I've tried Geth Infiltrator again, packing a Geth Plasma Shotgun and all the melee enhancements I could muster on Silver.

Hilariously fun, but not very effective since apparently Geth heavy melee drains shields >.> <.< Once I decloaked, I was easy pickings for anyone nearby, heaven help me if I had Hunter Mode on.

Also, I apparently can't use the GPS very well =P

Maybe I'll just play a Krogan instead for my melee fun =P