Typical combat
Rd 1: Temporal acceleration of 15 points for 2 rds, quickened action
Sub rd 1-1: Schism
Sub rd 2-1: Vigor of 85 temp HP
Rd 1 action, cast Mirror image 39 PP expended
Rd 2: Temporal acceleration of 15 points for 2 rds, quickened action
Sub rd 2-1: Dragon prophecy full round
Sun rd 2-2: Energy adaptation
Rd 2 action, cast Stoneskin
Rd 2 Schism, mind thrusting or energy ray 30 PP expended
Rd 3: Temporal acceleration of 15 points for 2 rds, quickened action
Sub rd 3-1: Inertial Armor to max
Sub rd 3-2: Force screen to max
Rd 3 action, Finger of death
Rd 3 Schism, mind thrusting or energy ray 57 PP expended
Rd 4: Do whatever helps the party most
By this time the fighters are hurt but my psion is fresh and buffed. He has a temporary action point (Eberron game) to help hit any target that he may not have hit, AC is 33, the creature if the get into melee will miss fairly often and plenty of temporary hit points to soak up damage.
126 PP expended and the character is protected and putting out quite abit of damage to help the party and will give out a lot more in round 4-6, Very few combats against even the toughest monsters go longer than that.