For you gear and enchants you should probably start grinding Sons of Hodir dailies to get the Epic Shoulder enchant along with Epic Gems. For you chest enchant I would definitely recommend getting 275 health over 8 stats. I would also go out and get 225 armor for your cloak, the amount of EH you are going to get with it is worth far more than 16 defense, unless you are doing Kologarn, Vezax, Auriya or Algalon with EH already appropriate for the fights.
There are so many options for an upgrade for the Repelling Charge, the Brewfest trinket if you got it, the Onyxia quest reward trinket, Essence of Gossamer, 10 and 25 man Ignis trinkets and the Valor Medal all are incredibly easy replacements for the Repelling Charge.
Trinkets replaced but I had to re-gem 2 gems for def rating to be able to stay above 540 without it. As for the epic gems it will be a while until i have the money for those. Not getting much help from my guild for being a MT.