Quick question for buff

[azteck]

does demo pact and flametounge totem stack with each other? cause i know totem of wraith does not stack with demo pact just need to know

[Razhiel]

Increased Spell Power Buff: Focus Magic, Improved Divine Spirit, Flametongue Totem, Totem of Wrath, Demonic Pact

They dont stack , you can only benefit from the most powerful spell granting the effect. So,which one is "stronger" stays active while the other gets ignored.