Originally Posted by
VigilantRose
I'd start with Dragonwrath, the Exalted rep ring from Icecrown, the iLvl 715 epic version of the Legendary (the more frequent proc will generally outweigh the Legendary damage boost), Regalia of Tiernon Glory (need pre-WoD gear to enchant, need MoP helm for epic metagem), legendary cloak.
The Dragon Soul trinkets are fairly good as well, although some of the pet-summoning trinkets have had (and may not longer have) scaling issues where the devs forgot to down-scale them.
In general, you need gear with a lot of gem slots and you need pre-WoD gear so you can enchant it (in slots that can't use WoD enchants). However, if you've covered the various legendaries above, you're about 95% of the way to 'perfect gear'.
The weapon enchant falls nicely into the "I dunno" category. My suspicion is that the right WoD enchant is about as good as you can get.
If you don't have Dragonwrath, you can probably get it in under two months solo. Icecrown rep can be ground out in a few hours. The MoP legendaries are unavailable if you don't already have them. A full set of Tiernon Glory would probably take 2-3 runs of SoO if you're not competing for loot (solo'ing it is unlikely, but a small group of 100s can do it easily). Dragon Soul can be solo'd, but Spine of Deathwing is sufficiently annoying that you might want to bring a friend.