There's a lot of people voting for Weapons of Light, but really Blessing works out a lot better. With Weapons of Light you have the chance of getting hurt still, eating up your shields gradually untill you are surcumbed to the buuble to heal. With Blessing Of Light you pop out fire for a much longer period of time than with Weapons of Light, come back in and your overshields are already recovered and are able to continue to do so doing more damage overtime. And in most situations that what you want since mobs are easy to take down. Weapons comes in handy during boss fights more so however, but I just stick to Blessing as keeping in the fight is more import to me than trying to do it the fastest possible.