Mysterea to EM conversion is bloody silly, as you can do an EM to Mysterea to EM conversion without much problems purely for the lols. And what Abraxas said about wizards is also the ghist of it.
Combinig those two in an screwball fashion, how about just losing the fireball magnet prep? For a few updates, just for the lols. Theres not enough "lets try something screwy" updates (or atleast they aren't advertised) and one like that might be usefull to test stuff out.