This was posted by Sym some time ago and I didn't read the whole thread again but i think you had mentioned adding it to KISS, I'll add to my toons individually for now and thanks again to Sym.
holyshit0=/if (${Me.Mercenary.Equal[ACTIVE]} && !${Select[${Me.MercenaryStance},Balanced,Burn]} && ${Select[${Group.Member[1].Class},Wizard]}) /stance balanced
holyshit1=/if (${Me.Mercenary.Equal[ACTIVE]} && ${Select[${Group.Member[1].Class},Wizard]} && ${Me.SecondaryPctAggro} > 75 && ${Group.Member[1].Name.Equal[${Me.SecondaryAggroPlayer.CleanName}]} && ${Me.MercenaryStance.NotEqual[Balanced]}) /stance balanced
holyshit2=/if (${Me.Mercenary.Equal[ACTIVE]} && ${Select[${Group.Member[1].Class},Wizard]} && ${Me.SecondaryPctAggro} <= 75 && ${Group.Member[1].Name.Equal[${Me.SecondaryAggroPlayer.CleanName}]} && ${Me.MercenaryStance.NotEqual[Burn]} && ${Target.PctHPs} < 90) /stance burn
downshit0=/if (${Me.Mercenary.Equal[ACTIVE]} && ${Me.MercenaryStance.NotEqual[Passive]} && ${Select[${Group.Member[1].Class},Wizard]}) /stance passive