Heres a thought for "Flash" (& those that can Cross-class it)

Flash
Arrgo Potancy: 600
Added Effect: "Rebound"
Effect Duration: 5-8 seconds (leave this to better ppl to decide time}
Effect Discription: Cause's buffed enemy to deal all or 50& of its (non cast bar in PvE case) damage delt to any target to itself
Chance of imunity: none (yes in PvP for fairness)

Thought about it as a way to give PLD's more damage mitigation & give it a use as OT to lower dmg to the MT (that & maybe lower the recharge time on Tempered Will to make it more usefull)