You have a neat idea there, but unfortunately, I doubt that it will work out. Ok, let me summarize this, even with stacked auras, Zeal, etc, a melee sorc is inferior to pretty much any other melee PvP char. A Smiter will own you before you can start hitting him, a barb will just WW you to bits, not even mentioning casters, who will just walk over you. Your current build will be torn apart in about 1 second.

However, let me go through your choices of gear quickly.

Leviathan = forget about it. Too high STR req.
Bramble = FHR is nice, Thorns is useless. It's efficiency is neglible in PvP.
Verdungo = nice choice, but have you calculated your breakpoints?
dual leech ring = effects on leech are neglible in PvP.
gloves = Dracs are a good choice but BM, Trang's are also a good choice, but BM as well. The other ones that you listed are garbage, forget about them.

If using Dream shield and helm (it's actually 2xlvl15 Holy Shock aura, not a lvl30 aura), you ought to make a pure light sorceress, also, they won't work for PvP. Forget about max block, unless you are going to Whitstan's or Stormshield, otherwise you will end up putting tons of your points into DEX (a good 400).

Most Enchantresses actually use Widowmaker and Guided Arrow

Also, the Vengeance on pallies is pointless. The skill sucks. Make an auradin instead, I suggest Smite auradin, Hammer auradin or just a V/T. Vengeance does not have what it takes, even with the best gear. What do you mean by a Fana pally?

Also, don't rely on mercs for PvP, using them is noobish and they will die in 1-2 hits anyway.

My answer is very oncoherent, since your post was extremely disorganised, but what I can tell you now is that your "group" is going to be weak in PvM and a joke in PvP. However, if you are interested in making a proper Enchantress, let me know.

Also, your main problem was that you had completely disregarded all breakpoints. Going on with that plan of yours will be an utter disaster.