Just Add the ability to cast soul link on the weapon, without it u are only doing like 8-10k damage with an int build.
Also there are many counters to holy light: GTB, Angeling, Maya.
People complaining bout holy light with a soul link, how bout:
Archers have FAS and with poring cards u do 55kish damage normal
Whitesmith has Pneuma and are able to pump out 30k spammable throws normal
Etc, Etc.
Give int priests a chance to be pvp viable.