I need help with anti-control cards...

[xtor]

I'm running a blue green black combo deck, and i need anti-control for it.
my current choices are xantid swarm, defence grid, and divert.
obvious choices are unmask, duress, chains, etc...
im sure there are better cards to use than these, but i cant support mana drain, force of misdirection.
let me know if anyone has useful advice.

[Dante]

I'm assuming your combo deck involves drawing cards, so Chains won't be too good for you.

If it's counters you're worried about, Xantid is the best, along with Duress.  Defense Grid is also solid, but it limits you're ability to cast draw/manipulation during their turn, which may or may not be an issue.

[silencebringer]

In the Eye of Chaos is easily splashable, and makes Force of Will and Misdirection all but unplayable.