Today on the blue post :
"Illustration of the Dragon Soul now increase your spell power by 20. (Up from 18, PTR change)"
well whatever will be the end result of blizz massing with this trinket it still will be one of the best trinket for casters and lock especially,
now i found an easy way to keep the 10 stacks buff up all the time with almost zero hassle!
just before any boss/trash fight cast 10 times detect invisibility its an instant cast and it cost only 77 mana witch basically scale to zero coz u still get mana regain in this time, then u just can keep it refresh with 1 cast every 10 sec to keep it up , once the fight start you don’t need to worry about it anymore.