Warlock demon pact and totem of wrath fight over which will be applied. It all comes down too which is more powerful. If you have a totem giving you +140 and your warlock has +1300 spell damage (10% would be +130 to party) you won't see any gain.

Also I think that the moonkin aura and the haste totem stack at least it showed the tooltip cast times decreasing when I had then both up.

Wowhead comments say that scorch/winterchill does not stack.