So I am currently leveling my Warlock. As it seems very fun and an interesting class that I have never played. I want to get back into raiding with this class and have a question regarding Specs.

Now I have played all 3 specs on my currently 86 Warlock. And all seem quite fun. I mostly enjoy Demo and Destro. Now, my question is it it viable to have both of these specs to use for Raiding? Or is it more beneficial to go Destro/Affliction. Reason I ask this is because from what I have read on a few sites, Demo reforges mostly Haste and then Mastery. And then for Destro, mostly Crit and then Mastery. So when geared, wouldn't I have a problem here? Since Demo would most likely be my Main Spec, if and when I were to change to Destro, I am thinking my dps will tank because I am reforged for Demo.

So can some experienced Locks shed some light on this for me? I really do not care which 2 specs I want to play, all seem very fun. But I just want to know which 2 are the best to have for ToT without having too many issues as far as stats go. Thanks!