Arcane brillance/Priest spirit Buff/ fel hunter buff Fel intelligence?

[Grendeel]

Whats best to use or how do they interact with each other?

Spirit Buff  80 i think
Arc Bril      60
Fel Intel     48 intel and 64 spirit

When a mage and priest had their buffs applied the fel intel buff got cancelled out.
When the mage buff wasnt applied the fel intel buff remained when the spirit buff was applied.

Im just wondering whats best for raid buffs.  Any thoughts experiences or ideas?

[Tolwen]

Did you get spirit from both buffs on the last try or just spirit from Emma, int from fel?

[KittyPurple]

They don't stack, only the relevant half applies, the other half is overwritten by the better buff.