Yeah... I believe it was even mentioned that, unlike in the game, he can use *all* spells of his sub-classes, even the ones he didn't invest anything into when he was gaming.
But I thought that the classes themselves that involve spellcaster were rather basic, because he went the "holy warrior route".
But it seems like I was wrong, although I have to say it would be pretty bad game design if you have to use an advanced magican class to get to the holy warrior archtype.
Magican (basic magic)- > Priest (adds support skills)
Warrior (basic combat skills) -> Knight (adds defensive skills)
Priest + Knight unlocks -> Paladin/Holy Warrior
Like this is what I imagined.
Didn't remember/know that he also had to take Sorcerer, which in my opinion, sounds like an advanced mage type class.