I've played this encounter dozens of times. The best way to play is to drop a bomb at the beginning killing 2 opponents immediately. Then swing to the first lookout and take out the 3 soldiers. Then the sniper on top. You will then get his sniper rifle to take out the 2nd sniper. Once this is done, the reinforcements will arrive. Hide behind a barrier and just lob grenades at them. You can kill all of them this way. I can finish this scene in half the time
This is gonna sound dumb but I would love a rpg with a gameplay similar to uncharted (What I mean is uncharted has the perfect balance between Shooting,melee and stealth gameplay)