For the sake of having a first guide :3 Well I wanted to test how to capture vids using Fraps, So I tried it on our fos3 raid and tried to get the medic feat. So this is basically what you need to do to get the feat on exp (well that's how I got it) and I'm pretty sure 80% of you guys already know how to get it. Here's the vid :
Nothing against you, but I think you guys had luck because any of medics did active their shields when you were hitting them nonstop.
It's actually really easy to get this feat. Most people go for the snipers first while the tank gets the medics. If everyone were to go for the medics first while the tank is juggling them the medic won't have time to put up their shield. The only problem you could have with that is if the tanks run out of power before the dpses have enough time to burn the medics.