Grenades...
	Head Shots...
	Iron Sights Mode...
	Melee Attacks...

Use your grenades when you need to clear out groups of enemies that are hiding in cover. Make sure you are a safe distance away when they explode.

Save ammo and time by aiming for the head to get one-shot kills.

When you are in perilous situations switch to Iron Sights mode so your aim automatically snaps onto the nearest enemy.

Whenever possible use melee attacks as these will charge up the M&E skill.