get the two 111 spellpower trinkets if you are an engineer with all toons
otherwise get the 111spellpower+remove cc and the spellpower on use+resilence (both from wintergrasp)

pyrorocket+instant lavaburst will do more dmg than spelldmg on use trinket+ lavaburst

stoneclaw totem glyph is a joke in my opinion, cause when u use stoneclaw totem you have no tremor totem up, whats better, fear"immutity" or ~4k absorb?
yes you can first put down stoneclaw totem and than one tremor, but this are two gcd's ... in this time you could cast a lesser healing wave with all toons.
in battlegrounds the stoneclaw totem glyph is nice but in arena it's crap.
i use flameshock,lava and shock glyph