...VERY LONG if both soul burn around too much...or use fogs right...and you both have high mdef...umm yah, sometimes it comes down to hitting each other dead, that's why dagger of counter is so godly on profs, let's you deal with caster types like that pretty well.
Anyway, I don't wanna get into it much, but maybe Albus and I can duel one day and show you guys how the fights sorta go >_>