The other 10 classes of base classes are not fixed and are used to cheese up the build.
I would like to see that the pure prc's have only one base class, like the shifter.
I see the following base classes for the Prc's:
pure pm = wizard
pure rdd = sorcerer
pure assassin = rogue
pure cot = paladin
pure wm = fighter
pure sd = monk
pure aa = bard
pure bg = ranger
pure dd = barbarian
If you have another class in your build you don't get the lvl 30 bonus ( so no uber summon for pm, no immunities for dd, no elder wyrm for rdd) other bonusses still apply.
This would change a lot of builds on the server, i know

But that happens all the time.