I am revising my earlier post on this subject. Because the diminishing returns on crit is so minimal in the game.
Primary Stats
* Strength (STR) - Increases your melee damage
* Presence (PR) - Increases your healing and boosts your companion's health and dps/healing
* Aim (A) - Increases your ranged damage
* Cunning © - Increases your tech damage
* Endurance (END) - Increases your character's HP
* Willpower (WP) - Increases your force damage.
Secondary Stats
* Power - Gives melee, force and tech damage
* Force/Tech Power - Gives force or tech power (not ranged/melee)
* Alacrity - Increases the haste for spell casting/channeling
* Critical Rating - Increases melee, force and tech crit rating
* Accuracy - Gives +hit and also grants armor/spell penetration
* Absorption - Percent of damage absorbed
* Surge - Increased critical damage
* Armor - Reduces physical and kinetic damage (Kinetic=Tech and Force powers)
* Defense - Increases Parry/Deflect (Deflect is a ranged parry)
* Shield - Increases chance to be shielded on attack
* Glance Rating - Block Rating
* Expertise - PvP stat
To an IA Operative Cunning>Crit Rating>Surge>Tech power>Alacrity>
The reason for this change for Crit Rating and Tech Power is this. I am one the best PVE geared Ops Healer on my server. I am sitting with a 50% Crit Rating, and 80% Surge. This being said my Kolti Injector, imminently followed by the Surgical Probe, will crit for over 8K heals. For this reason, Operatives are the best single target healers in the game.
I have little experience with BH Healers to judge them. I have alot of experiance with SI Healers, and they seem to be the Best AOE healers in the game.
I hope this helps anyone.
My experience with healing is SWTOR is priority based healing meaning I rotate healing the person who is lowest HP at the time of my next cast, Always using Kolti Injector followed by a Surgical Probe. For the tanks, I always renew dots, and use the tactical advantage for Combat Stim>Surgical Probe. Always when you have a surgical probe ready to cast use it one someone then switch to who needs the most after casting.
I have noticed some times in log Ops Fights, I need to recharge energy. When doing so usually group healing is used while. An alt healer would usually role over to fill in the gaps.
I have noticed, I am never out of commission for more than 10 seconds. And still try to cast a hot every 3-4 Diagnostic Scans.