not 100% sure about the glyph thing but i do know that the spell benifits from totem of wrath and flametoung do not stack. totem of wrath is 104 SP where as flametoung is 140 SP, at least i think i might have those numbers reversed. >.> but ether way i know they dont stack you can only get the max spel power from one of them. which ever one has more SP is that total amount that you get. but the critical benifits from the wrath totem are still applied. if your using mutiple shamans i suggest at least one of each, b.c i belive the flametoung has more spell power. and to be safe if ur 4-5 boxing have 2 of each. just incase one where to get destroyed for any reason.