Here is a list that may help you get started
-Old meta gem. New one is Revitalizing Primal Diamond.
-Wrong second trinket. Definetly no 'the' trinket that clears all effects. Get the Medaillon of Meditation, even the blue one is better (so may be wise to get that next patch).
-Stone Bulwark Totem is the worst totem regarding PvP. I would recommend Nature's Guardian especially since it's nice buff in 5.2. When you get better at it, you can swap to Astral Shift when you feel confident.
-Swap Primal Elementalist to Unleashed Fury. If your target is on low health, an Unleash Elements + that talent + AS with big heal can easily push out 300k if it crits. That is one hell of a heal.
-Glyphs are wrong. You definetly want Glyph of Ghost Wolf as it will not lower your speed below 100% which is nice. Swap that for Totemic Recall. Glyph of Purge will be bad in 5.2, but I have yet to find out a suitable replacement for it.
-PvP weapon is really mandatory. You may not notice it yet with your kri'thak weapon, but it is a huge bonus.
-Keep the Relic of Chi-ji for the time being, it is a nice amount of mana regen.
Anybody that says that Boomkin/rsham is a bad comp can just shoot theirselves. Sure, it may not reach the top of the bracket, but if you're good at it, you can get 2.2k in the long run. And far more satisfying then facerolling it with a melee class.
Hope this list helps you on your way