As more gear becomes obtainable through the farm content, we're starting to get more choices.

Some choices are obvious. You need to have 4 piece. Soul of the dead is prob our best trinket. And you want The turning tide over the torch.

but some are less obvious. like which piece of offset do you want over the t7 set.

Personally i think the biggest upgrade is the mail chest tunic of the artifact guardian. you lose 60 haste over great aspects http://www.wowhead.com/?item=40453#comments but you gain in just about every stat that matters... SP crit and int. I also think the mail bracers are worth having with a SP or Int gem in there over the plate bracers.

Everything else is pretty much cut and dry. Sapph neck. 2drake cloak. Girdle. poignant sabatons. KT ring. siezed beauty. soul and illustration or JC trinket if you can't watch your own mana.