I would link my armory but i'm in tank spec and gear right now, And I find by doing this is easier then using armory due to flammers and so. I will list all my gear that I'm using, And please let me know what you think I should gem. And What Enchants I should put on them.
Thats all, Keep in mind I will probrabbly be replacing a lot of these due to running ICC 25 and 10.
I'm gemming horiibly right now and some stuff isn't even enchanted/gemmed yet, But I manged to pull 5.2k On Saurfang 25. and I know if i get my enchanting and gemming down I can get more out of my dps.
With the needle encrusted scorpion, the plan is to gem to hard cap armor pen when it procs, ie soft cap. The soft cap with this trinket is 722 as far as i remember. Your helm meta gem should be the agility and increase crit damage one, you should use one 10 stats gem in a blue socket for a good bonus (6str or more) and the rest of your gems should be 20 ArP, or 20 str if you manage to soft easily. It may be benificial to use str/crit gems in yellow sockets for good bonuses but you'd need to put your gear in something like Landsoul's spreadsheet to find that out.
If you log out in your arms gear and provide an armory link, I'm sure plenty of people are happy to correct any enchants you have etc.
I was on rawr and If I gemmed All ArP In all slots except for what I need for meta to work I would have around 50% ArP un proc`d with NES and it would be almost 96% when proced. and would still have around 11% hit which i think i'm already over in my gear.
So should I gem ArP ?
Also RAWR is known to be WAYY wrong so this might not be 100% right