Taking core class levels after taking prc levels

[Sojinator]

I'm not entirely new to D&D, but I was never quite certain about how to take core class levels after you've taken a full PrC progression.

For instance, if I were Cleric3/Wizard3/Mystic Theurge 10, and I wanted to continue taking levels in Cleric, how would I go about doing that? Since I would get +1 level of existing spellcasting class per level from MT, would I just pick up where I left off at Cleric 4, or would I gain spells as if I were Cleric 14?

I've looked around for an answer, but I haven't been able to find one. I hope this isn't a silly question to ask. In any case, any answers would be greatly appreciated. Thanks!

[Hirax]

You'd take cleric level 4 and have spells as a 14th level cleric.

[deuxhero]

Note: Core class means the PHB/DMG/MM1 classes. You mean "base class"

As for the casting, you opperate at the total, but remember, wizard 13/cleric 14 casting is terrible compared to a Wizard 17 or Cleric 17.

[Sojinator]

Awesome, thanks! that's all I needed to know.

[Sojinator]

DeuxHero, I know it's not anywhere close to an ideal build, I just needed a reference point for the question I was asking. Thanks again!

[Strormer]

It is true that MT is nowhere near as optimal as solo Wiz or Clr, but still, make the character you wish to play, not the character that is the strongest. As an old Chinese man once said, fasting at the feast of power refreshes the spirit, or something like that.