a blm can't out nuke a pup
Just so we're playing fair here, lets be clear: the automaton can easily obtian massive magic attack bonus. BLMs can get more, but they need all kinds of gear, some of which is rare. Also, we're talking about automaton and BLM casting the same spell. BLMs do have other nukes and can nuke more frequently (but nuking much faster than the pup will put the BLM at risk, whereas the PUP is basically never in any danger while nuking)