Sun Paladins will be one of the new playable class, wont tell how they get unlocked obviously

They will use a new kind of talents (akin to techniques, spells, wild gifts, ...) called divine.
Divine is obviously related to the valar but in a distant way, sun paladins as their name says revere the sun (and thus Arien).
They are a melee/caster hybrid that uses weapon & shields + divine talents.
The current divine schools are as follow:
- Chants: 4 chants as sustained effects, only one is active at one time
- Light: healing & protection (not sure this is sucha bright(...) idea to have too many talents to heal)
- Sun: light/fire based attacks
- Combat(divine): melee enhancement, will remind a bit of tulkas
- Glyphs (not accessible to sun paladins): setup glyphs on the floor for various effects
Divine talents mostly use the magic stat.
Now I am not sure what power source to bind on them.
Currently we have:
- techniques/cunning: stamina
- spells: mana
- wild gifts: equilibrium
Each working in a different way.
Now I am not sure what to do with divine. Piety is the obvious one but I am not sure how it would work. I also dont want to associate the valar too closely, so probably no worshipping.
They could use mana but I'd not so happy with it.
Currently they use nothing and are based on longer cooldowns, this can work maybe.
Note that at least an other class will use divine talents, the Anorithil (sun-moon mage, better name is welcome) which will be more like mages, using the existing divine talents + divine talents bound to the moon.