[Theleb]

All of the above is good advice, but no-one's mentioned Initial Spell Order - its commonly accepted that in order to take advantage of GCD's then there is a certain order to throw DoTs up onto a target. Now of course there's never a firm rotation after that given the differering spell durations but browsing through the articles here seems to show that on trash:

UA > Corr > SB (On slightly tougher trash I go UA > Corr > SiLi > SB)

On Boss fights:

*assigned curse* Trinket > UA > Corr > Immo > SiLi > SB Spam until refresh. If that means you have chance to use CoD then the order should be something along the lines of:

*amp curse* Trinket > CoD > UA > Corr > Immo > SiLi > Spam.

Regarding gear.

In terms of pure +damage gear there are a number of good guides showing you where to pick up the best (I'm also a tailor and used 3 parts Shadoweave with 2 parts T4 (the 2 Part T4 Bonus is @35dps) for ages)) so you could well end up grinding a lot of mats in order to get your items made, or seeking out people with the patterns if they don't drop for you.

Run heroics. Some of the badge rewards are well worth getting, and as noted do some PvP - even if its just a couple of thousand honour a day to get the S1 Spellblade (I'm sure you can put up with that if you're so concerned about raid performance) and ensure that every single +damage enchant is in place on your gear (I don't see the need for +4 stats on bracers).

Basically I don't think there's much you're doing wrong - just need a little work on fine-tuning.