Recent add-ons include a set of six pentaclasses, that could each link with one from the six spellcasting classes ( like )
6 --- Bard Cha
2 --- Druid Con
5 --- Elementalist Str alterations evocation invocation
3 --- Illusionist Dex illusions phantasm
4 --- Priest Wis abjuration necromancy divination
1 --- Psionicist Int
Well, it's the order given on #6