Shang, swap your weapon to hit mast and your boots to full mast as was stated, but also swap all of your reds except 2 to expertise mastery, if you use the AMR addon then just paste this into it. You can gain 5.06% mastery at the cost of .06% haste and less than 200 spell power.
Code:
region=EU;realm=Ravencrest;name=Shangalar;faction=Alliance;spec=62;talents=233122;glyphs=56380,115705,146659,63092,63093,89749;race=Human;professions=Herbalism:600,Inscription:600;item=7:103806:0:491:b:4650:76700:4429:144;item=2:99153:0:491:r,r:4623,4623:76672,76672:4915:147;item=6:99162:0:493:y,y:4650,4650:76700,76700:4825:145;item=8:103851:0:491:0:0:0:4414:0;item=4:99152:0:491:r,r,r:4622,4622,4622:76671,76671,76671:4419:145;item=15:103873:0:493:b:4594:76643:4442:145;item=5:105781:0:493:y,b,p:4650,4594,4650:76700,76643,76700:0:138;item=0:104499:0:491:m,y:5033,4650:95347,76700:0:140;item=9:99160:0:493:r,r:4622,4622:76671,76671:4433:147;item=14:102246:0:493:r:4622:76671:4423:144;item=10:104447:0:491:0:0:0:0:147;item=13:96083:0:467:0:0:0:0:154;item=1:103868:0:491:0:0:0:0:140;item=11:101937:-114,-359:493:0:0:0:0:138;item=12:104426:0:493:0:0:0:0:0;
The hit you get from the gem socket on those boots just isn't worth going for. Same with the haste on the thok ring when you get it, just jam a yellow one in there.
Istreddu, for the gear you have I would strongly suggest using 4 set with the legs as your offpiece until you get more optimal/warforged offpieces. The 4 set is amazing for progression for two reasons, it is a decent damage increase when it procs, more missiles is more damage spending less mana staying at max stacks longer etc. The other reason it is so good for progression is it's more damage directed at your kill target, I use 3 offpiece and while I do a lot of damage, I average less damage on the actual kill target than Eightroad (other mage in my guild) because he uses the 4 set. At the end of garrosh we will be close in overall damage, but he sometimes has up to 10 million more boss damage than I do, and that's quite a big deal.