Any skill that hits can proc future strikes, which is what makes Devouring Orb with the abyssal orbs node so powerful against packs. The only one that doesn’t (until they fix the bug @Hackaloken) is Smite.
Vyroze, the future strike debuff is a purple kinda bubble debuff. If you’re going future strikes you always want to max that node. You may find my build here useful, though I’ve not updated it to 0.7.8 yet.