Cool!
How did the system play with 20+ level spells getting chucked around? Is it dramatically different? Were non-casters still viable?
Good question. The lineup for that epic game was:
High Elf Archmage (Champion of Eltara, God of Magic)
Dwarf Cleric (Champion of Alakar, Head of Pantheon)
Half-Elf Ranger (Champion of Myrill, Goddess of Nature)
Human Nightblade (Champion of Cathos, God of War & Vengeance, when in a vengeful mood)
High Elf Fighter (Champion of Naydor, God of Fate & Death)
So as you can see, most characters were pure and semi spell users. Magic gets rather impressive once 15th spells can be cast easily. I never really had any difficulty challenging them, but then again their enemies were rather epic too.
I will admit, they would have had a harder time dealing with the usual opposition of undead armies, wraith lord sorcerers, ancient dark drakes, demon lords and demi-god emperors if they were just a plucky band of fighters with moderately powerful equipment.
I will say that by 20+ level the fighter was so quick and skilled that she was a fitting champion for Death.