I have been trying to get this question answered, but CustServ doesn't do questions based on 3.5 material anymore and the "Ask a Simple Question..." thread at the wizards forums keeps skipping my question, so I'm going to post it here hoping to get the answer I'm looking for.
I was wondering on the basis of classes and prestige classes (most likely the latter) whos' caster level is dependent on the levels of one or more spell casting classes (Example classes: the Nar Demonbinder and the Ur-Priest, I'm sure there are more but I can't think of them) on how they work.
As an example, If I were to take my first level of Nar Demonbinder after taking 5 levels of Wizard and 2 levels of Incantatrix, what would my caster level in Nar Demonbinder be? Would it be 6 or 8? Thanks in advance.