Firstly a couple things to improve yourself with where you are:
Your effective health is high, u have gemmed full out stamina. With a loss to avoidance, never ever gem parry its your least important stat. Dodge begin highest. I would sacrifice some stam gems for avoidance with current gear. You dont need 29K unbuffed for Naxx 25.
Your talent spec is a bit off, you will want to go for deep wounds build at your gear level for max tps. 15/5/51
I think you could most definitely OT Naxx 25 possibly even MT. Hope this helps
Only a warrior chooses pacifism; others are condemned to it.