Here's my Jedi/Reality-Weaver (ill/emp) build:
I'm not happy with every choice I have made so far, but the basic concept works: Staying hidden/out of combat all the time, concentrating exclusively on team support.
When I do a good job, the enemy will never even know I was there.
1: Spectral Wounds & Healing Aura
2: Heal Other
4: Blind (doubt I would take that one again)
6: Recall Friend
8: Flash (horribly slow recharge; a complete disappointment)
10: Resurrect
12: Superior Invisibility
14: Teleport
16: Float (for use with teleport)
Planned:
18 & 20: Assault and Manovers
Afterwards: Clear Mind, Spectral Terror, more Healing, perhaps even some Medicine Skills
Slotting (current and planed):
Healing Aura & Heal Friend: 3xHealing, 3xEndurance
Resurrect: 3xRecharge Reduction
Superior Invisibility: 3xEndurance
Manouvers: 3xDefense
Assault: 3xDamage
And a few others here and there.
Basic Strategies: Concentrate on healing, using my illusion powers mostly to stay out of sight. Teleport team when need be, for example taking fallen members out of combat for use of wakeys when resurrect was already used / is recharging.
Also useful to get slower team members quickly to entrance of next mission, or to pull them out from immediate danger.
Advantage: Always in demand, never seen EXP dept so far.
Drawback: Completely useless without a team to support.