But with pawn talent it doesnt really matter as you can move on the fire easily for free =)
But Executioner seems far more useful for AoE nuke Pyro mage. Maybe not an as effective starter, but at least it will be seeing plenty of AP+2. Since it will be teleporting most of the time (phoenix dive, spread your wings, netherswap, and so on) and mages are primarily ranged casters, the 0AP movement for repositioning seems a waste.