I get a lot folks asking me what I use for Incarnates. 95% Time this my order(I also think for teaming also).
1. Alpha: Cardiac - Left Side. Hands down in my opinion best incarnate period for majority of builds. 45% discount to endurance costs, +25% resist bonus & +20% range bonus to powers.
2. Destiny: Barrier - Left Side. Honestly best teaming buff. Especially if you got hodge podge of levels & builds. +Res & +Def AoE for all in it.
3. Judgement - Ion or Pyronic. Usually Left Side. Jumping or Exploding from center attack. Hard to screw that up, yes you can, but easiest over all for folks. Now if I'm melee then I go for the PBAOE attacks or top two, again depends on theme of the toon.
4. Interface - Diamagnetic - Right Side. 100% chance of -Regen and 50% chance of -Tohit. You can't go wrong, this allows "All" your powers, yes even MM Pets to stack -Regen. Great for Boss, AV, Giant Monster, Heros, etc.. fights. Especially if your own powers have no -regen. Now some builds like say Radiation Emission, etc.. I'll pick one powers that adds ore damage like Spectral for example. It comes down to the overall build.
5. Lore - Whatever, though Drones have -Regen in them also. They also gain use of whatever your Interface is as well(Same as MM Pets).
6. Hybrid - That honestly comes down to what I feel I'm lacking. Maybe I need more status pro/resists or more damage or more defense, etc.. That basically comes to tastes.