I use a G13 mouse and razor keyboard with alot of different key combo's etc. I don't have a good priorty spot for shatter so its bound to 2 different keys depending on my positioning, it just makes me for flexiable 3rd one is old key.
Honestly the hybrid is about picking your spots and energy management. If you are a person who doesn't want to worry about energy control then don't play hybrid, or at least my version of hybrid. Honestly I am the only noteable sniper on our server that I know that runs hybrid. Basically everyone else is lethality and 1 or 2 full engineers for plasma to control nodes better.
Rated kills are all about alot of damage in a short period of time to prevent guard/heal rotations so my quick hitting combo is debuff with scatter shot, int probe to start ticking/drop any shields, exp probe, ambush, SoS then stand to pop free overloads to spam on him until takedown is triggered. I'll pre-load CG as well if I need to.
My hybrid is developed strictly for rated games, its not nearly as good as marksman is or full eng is for a straight 1v1 match but for team play using proper energy management I can put more pressure their healers then just about anyone ingame by mixing hard single target bursts with strong ae. I've 4v1'd people in pugs in Civil War before just by using orbital, CG (snare), seismic grenade, frag grendades, Flash Bang. Hybrid can be a wedge breaker, drop crouch and defensive cooldowns and take the 3-4 people rushing you while you cast orbital then look them down and melt them.
Marksman is by far my favorite spec and my most skilled spec but it just doesn't have near the damage potential of this spec. I've been running this off and on since prior to 1.2 and i'd say I was top damage in 99% of all games I've played since.