Hello mmowned, this is a good tip for you mages out there.
On my wotlk server I used: Arcane Intellect ( Arcane Intellect - Thottbot: World of Warcraft )
And also I tryed to apply Dalaran Intellect ( Dalaran Intellect - Thottbot: World of Warcraft )
and holy, it worked to stack I like wow 120 intellect.
Then I tryed with Dalaran Briliance ( Dalaran Brilliance - Thottbot: World of Warcraft)
Guess what? It stacked to.
Step 1, Get Arcane Powder.
Step 2, Buff your self with Arcane Intellect, Dalaran Intellect and Daralan briliance and they will stack , two simple stepps , Also, It works to replace Arcane Intellect with Arcane Briliance. And it works on others to.
Hope this help you all