Suggestions

you will gain 5.33% from the libram,this should free up some non-stam gems and once u have 12k hp unbuffed, you should stack some spell dmg gears for 25 man, idealy, would be 350 SD around.

for trinket slots, i suggest 1 stam trinket+pocket watch. you may need another stam trinket(enginner/netherwing commander badge/darkmoon furies/lunacy deck).
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http://www.wowarmory.com/character-sheet.xml?r=Proudmoore&n=Sindorei