You have the answer for any desperate situation.

Encounter   ✦     Healing, Martial
Immediate Reaction      Close burst 10

Trigger: One ally within 10 squares of you spends an action point to take an extra action

Target: The triggering ally in the burst

Effect: You choose for the target to gain one of the following benefits: regain hit points equal to one-half your level + your Charisma modifier; gain a bonus to the extra action's attack rolls equal to one-half your Intelligence modifier; gain a bonus to the extra action's damage rolls equal to one-half your level + your Intelligence modifier; or make a basic attack or take a move action as a free action but grant combat advantage to all enemies until the end of his or her next turn.

Published in Martial Power, page(s) 125.