[Soulzar]

Can you describe a typical fight?

How much threat do you give your tank before starting to dps? What type of trinkets do you have and when do you use them? Do you chain mana pot? when do you use shatter? Whats your group comp?

23% crit is more than enough, in fact I think it is about exactly what I have. I would drop crit for damage or haste if I could as sometime my spike threat from a good crit streak tosses off my threat pacing.

I would focus on increasing your spell damage ans haste ratings, before even concidering crit. Untill the expac, of all the good lock stats, crit is of most abundance through group buffs, so i always chose to pick up haste or damage over it.