In simple, and plain english. Hybrid Lethality/Engineer sniper has excellent single target and AoE damage. I've not really had the opportunity to use it in PvE, but in PvP it can rack up some satisfying numbers.
My personal best within PvP was 2.1k dps. Using four attacks;
- Fragmentation Grenade -> Deals up to 4500 on a critical hit, it can hit up to 5 people, so place it well and that's 7500 - 22500 damage a throw.
- Corrosive Grenade -> A low cost AoE DoT, when you spec into the DoT after it finishes it becomes a liability to the victim, it can tick a hit of 1200~ on a crit, which grants you a bit of energy to! Cover their entire team in it.
- Corrosive Dart -> A little more expensive, but still worth using, cover their entire team with it, more dps, more energy no drama.
- Orbital Strike -> Just a nice chunk of damage