hey, firstly don't feel down everyone has a start :P in time your gonna get the feeling of the spec hence also rotation wise
Secondly : just to make sure ! Doom guard does not benefit from secondary stats (mast,hast,crit) just from intellect so you would want to summon that bad boy up with trinket procs : >
on the other hand it seems your using kiljadeans cunning ill advise you into making a stop cast macro if needed if trinkets happen to proc while you cast an incinerate you could stop and switch to a CB (cause dark shaman trinkets proc time is really fast)
a quick remark to yo