I just had a thought (yes another one

).
Bit of a long shot but would it be possible to add an option to the XmlSpawner itself to be able to spawn "Elite" spawns for lack of a better word. What I mean is for when this option is set (possibly a preset int or a defineable int depending on which is easier/possible) it makes whatever it spawns int% harder with int% more gold. Just thought it would be cool to make mobs in fel say 10% harder than all the mobs in tram. Or perhaps it could be used for dungeons so as you get further into a dungeon the mobs get progressively harder like 2nd level 10% harder 3rd level 20%, etc.
Just an idea, may not be worth the effort but just thought I'd share.