Well before this spec I was full gunnery and had some points in the healing tree. I couldnt beat people in 1v1 situations unless they had less or same gear as me and I had the 1st hit.
I was also very easily killed by sith assasins, marauders, dps juggernaughts and sorc hybrids. Then i tried out a new spec. I could take on about 3 people who were a bit less geared then me and kill at least two. I was able to get more medals then my average of 7 and became more useful by healing my team mates when needed.
I used to feel like a useless cannon but now I get messages saying things like, "great heals" or "Ill pvp with you anytime."
Please dont troll, I am pretty new with forums.
Basically you heal and dps and use hammer shot alot to get your super charge cells available. Then you put up to 5 gravity vortexes on the enemy, Pop supercharge, adrenals and relics and just start spamming charged bolts which will have no cost for about 10 seconds. You should also get a pve gunnery 2piece for the 15% crit increase for charged bolts or gravity round. Have fun and see if this helps YOU in 1v1 sitiuations.
GO HYBRID GO!!!
http://r2-db.com/skill-tree/calculator/5/trooper/commando#build=8iddd6k86ucl701000000000000000