Dont forget our ST shield is instant cast with a small heal. Its extremely amazing spot healing on fights or long segments of heavy movement, or when you need to get a shield up asap to prevent a dps from possibly dying.

On a tank its not as beneficial, simply because it'll power through your mana, but the 5% potency helps with the other healing forms as well. Its nice to precast a benefic I or II and then insta pop an aspected beneficic, heals nearly anyone to full and plops a nice shield on top of it.