Not sure how big fulcrums are supposed to be and therefore if this will work but: What do people think of Tehen on an Ancient Stegadon sitting on an arcane fulcrum? Burning Alignment and shooting becomes 360 degrees and it makes him hard as hell to kill. Not as super broken as other stuff I'm seeing but something that could be a fun trick to pull off.
Actually Fulcrum specifically can have a monster or monster mount on it as long as the wizard is there. In all other regards it is treated as a building. Relevant text: