U_K!
Thanks for the Info!

Unless the Mazzaroth get numerous bonuses/powers across the board, the easiest way to win would be to give a commoner Infinite Strength and Dexterity, (probobly easier said than done) and send him in. He has just as much chance of winning as anyone else. (.02%

)
Historian!
I think this question is best left unanswered.

He seems to get alot from biblical mythology and other assorted religeous texts. (the names anyway)
As for the nexus dragon - It doesnt specifically say it gets more Hit Dice each virtual size increase, but it does get more Strength, con, and natural AC. At best it would give the dragon a limited fast healing effect, but Its HP would stay mostly the same. (Though, since it can cast any kind of epic spell it wants in any round, it would probobly just cast a contingent full-heal+ressurection on itself round one, and recast it after it goes off. )
The epic spellcasting abilities of the dragon, I think, are its most dangerous quality, since it allows it to defeat any attack that its potent defences don't allready counter.
A Great Wyrm Nexus Dragon would make a great mount.

(For a level 30000 Paladin anyway)
EDIT: U_K! Your website still works for me. Maybe you just can't acess it...