Rainbow servant cheese build

[SCOTTEPIPPEN]

Does anyone of you guys have a 20-levels build using the Rainbow servant with the lv.2 cheese entry? Also is it better Earth Sense+Heighten Spell+Sanctum Spell+Earth Spell or should i pick Versatile spellcaster instead of Earth sense+Earth spell? No Dragon Magazines and ToB allowed.

[Karl Aegis]

You've exhausted most of your build options gaining entry into the class. There's not much left to build.

[schreier]

You're asking what other classes for the build? What feats, etc...?

Are you using the Text over table interpretation?

You'd be level 11 - Beguiler 1 / Rainbow Servant 10 / X at that point
Feats lvl 1 = Heightened Spell, Versatile Spellcaster, Sanctum Spell - human w/ 1 flaw or another race with 2 flaws

Good classes after that - you don't really need Sand Shaper since you already have the cleric spells.

You have 9 levels left - could go: Incantatrix 9, or Dweomerkeeper 9, or Initiate of the Sevenfold Veil 7/Archmage 2

If you want to take advantage of Divine metamagic, take 1 level in sacred exorcist ... probably with extend spell, persist spell ... there, definitely take alternate source spell so you can DMM any spell you want