I'm still surprised how far away you can be to a player and still revive him.
- Directly from the back (90deg perpendicular to the back, not just onto the back) = 2 rpgs (it will also give a hectic mobility hit and the guy wont be able to move at all)
- Directly from the side (90deg perpendicular again) = 3 (up to 35hit)
- Anywhere else only does around 21 to 23damage, so 4+ rpg's.
I'll find a youtube vid explaining just now and repost it.
EDIT: Heres one from the beta, but its still the same
http://www.youtube.com/watch?v=rjp-nk-RkcM