Thanks for the answers.
Your English is good!
Wow, taking the Chameleon past it's Spell level 6 limit is making an already incredible PrC and making it more so. I'd be nervous to be the DM of such a PC.
With that said, the build looks legitimate, as long as you keep your Arcane Focus. Any day you don't have Arcane Focus up, you lose the qualification for the Sumblime Chord PrC. But that should be pretty easy to do.
As for the first 5 levels, You'll need 1 level of Bard to meet Sublime Chord's "Bardic Music Ability" prereq. Past that I'd recommend Factotum 4 as a solid choice. Bard or Sorcerer for the CHA investment could be good. Warlock 4 might be very interesting.
I'm assuming you're taking Chameleon to 10 before starting in Sublime Chord. If that's the case, by level 20 you'd only start casting your first level 7 spell. Do you have a different build in mind?
By the time you've reached level 15 (5 levels base, 10 levels Chameleon) You should be able to invest gold into some useful stat-boosting items. Also, your +6 ability boon from Chameleon 10 on top of a CHA of 13 fully covers whatever you'd need for spellcasting from Sublime Chord. Yeah, it would be nice to invest those stat points into something else, but I think you'd be ok.
The Factotum really suits the chameleon flavor! I never played one, but it worth a try.
I made a research and came across to this two builds:
factotum 4, cloistered cleric 1, chameleon 8, nar demonbinder 7 (PrC of Unapprochable East pag. 25) - cast 8th spells at lv 20, CL23
and
factotum 4, bard 1, chameleon 7, sublime chord 8 - cast 8th spells at lv19, CL 22.
My DM do not roll the abilities. He houserules that the sum of the abilities must be 84, so it would be ok to go for Str 10, Dex 10, Con 10, Int 18, Wis 18 and Cha 18. What do you guys think of this builds? would you allow it? which one is best?
I need at least Cha 18 to cast spells from higher levels. Additionally, I need Wis 16 and Int 16. I would like to have some more points in Dex and Con, but no one is perfect.
To reach a higher level of casting you can pick up either of the following: Planar Touchstone (PlH), Extra Slot (CAr), and Improved Sigil (Krau) (RoD); or Sanctum Spell, Versatile Spellcaster, Heighten Spell + Earth Spell, or Improved Sigil (Krau), followed by Wonderworker (BoED), Mystic (Dragong #274), Dragon Disciple, or Eunuch Warlock (OA).
For particulars,
The Chameleon Handbook is your go to resource for Chameleons in all their glory.
OF SPECIAL NOTE: The Trapsmith PrC from Dungeonscape has Haste and Dispel Magic as 1st level spells (among others), Dimension Door and Stoneskin as 2nd level spells (among others), and as 3rd level spells has Greater Dispel, Fabricate and Wall of Stone (among others). The Chameleon can draw from ANY spell list. USE THIS KNOWLEDGE WISELY.
Thanks for the handbook. As for the little tricks, i believe the builds I posted would be a fair substitute. These builds are already powerful without questionable matters, so I think i won't use them.
What you need to do to advance Chameleon is find PrC's that advance existing spell casting. You do need to find requirements outside of Chameleon as it says its class features do not qualify for other PrC's. You can actually pull it off with a Geomancer(Dragonwrought Kobold cleric/factotum with Precocious Apprentice). This actually allows you to select any spell in existence as the Chameleon gets access to all spells it is capable of casting and the key feature of a Geomancer is sharing spells of the two types in the slots.
As for independent casting Complete Divine is filled with independent casting classes most notably the Ur-priest.
Ur priest are out, because evil characters are forbidden. On the other hand, the geomancer is a prestige class that I don't know well, I'll give a look.
For some reason, I can't XP you RUMBLETiGER and Sekhmet...