Perhaps I haven't managed to read the precise part of the DMG or PHB that explains how multiclassing and PrC's work. Because from strictly adhering to the rules in the PHB, if you're a wizard qualifying for Archmage, you're going to take a XP penalty for a long time as you're likely not going to get your Archmage level within 1 of your Wizard one anytime soon (ever actually).
So how does it work? Do you seperate the two levels of classes and every base class has to be within one and every PrC has to be within 1 of any other PrC to avoid the penalty, or do you just not count PrC's towards XP penalties?
So how does it work? Do you seperate the two levels of classes and every base class has to be within one and every PrC has to be within 1 of any other PrC to avoid the penalty, or do you just not count PrC's towards XP penalties?