These are from my notes (and include the stat blocks from the LoA and DS Core for those that were provided. I have some alternates (at least one for Tek). All of these were from before our discussion last year on your AB framework, so they can be adjusted accordingly.
EDIT: Copy and paste messed up the format; will redo in the morning.
1st Champion of Rajaat: Sacha of Arala, Curse of the Kobolds Defiler 5/Seer 5/Elocator 6/Cerebremancer 10/Arch Defiler 2
Metamind? Lurk?
2nd Champion of Rajaat: Kalak, Ogre Doom
Defiler 5/Beguiler 3/Telepath 3/Cerebremancer 10/Ultimate Magus 10/Athasian Dragon 2
3rd Champion of Rajaat: Dregoth, Ravager of Giants
Defiler 7/Egoist 8/Cerebremancer 5/Arch Defiler 10/Athasian Dragon 8
(From Dregoth Ascending)
4th Champion of Rajaat: Myron of Yorum, Troll Scorcher
Psychic Warrior/Defiler/Cerebremancer
(Legends of Athas)
4th Champion of Rajaat: Manu (Hamanu) of Deche, Troll Scorcher
Defiler 5/Psychic Warrior 11/Arch Defiler 10/Cerebremancer 5/Athasian Dragon 4
(Core?)
5th Champion of Rajaat: Uybess (Abalach-Re) of Waverly, Orc Plague
Wilder 10/Defiler 10/Cerebremancer 10/Athasian Dragon 2
6th Champion of Rajaat: Gallard (Nibenay), Bane of Gnomes
Defiler 5/Seer 5/Loremaster 10/Cerebremancer 10/Athasian Dragon 2
7th Champion of Rajaat; Sielba, Destroyer of Pterrans
Defiler 5/Seer 5/Arch Defiler 7/Cerebremancer 6/Athasian Dragon 2
8th Champion of Rajaat: Albeorn (Andropinus) of Dunswich, Slayer of Elves
Egoist 5/Defiler 5/Cerebremancer 10/Arch Psion 3/Archmage 5/Athasian Dragon 2
9th Champion of Rajaat: Tectuktitly, Wemic Annihilator
Divine Mind 10/Defiler 7/Cerebremancer 10/Athasian Dragon 1
Or-
Psychic Warrior 8/Defiler 5/Arch Defiler 7/Cerebremancer 8/Athasian Dragon 1
10th Champion of Rajaat: Keltis (Oronis) Lizard Man Executioner
Preserver 5/Shaper 5/Cerebremancer 10/Loremaster 3/Avangion 5
11th Champion of Rajaat: Inenek (Lalali-Puy), Aarackocra Scourge
Defiler 5/Telepath 6/Arch Defiler 5/Thrallherd 4/Cerebremancer 5/Athasian Dragon 2
(DS core? The levels don’t meet the prereqs)
12th Champion of Rajaat: Wyan of Bodach, Pixie Blight
Defiler 5/Arch Defiler 5/Seer 5/Metamind 6/Cerebremancer 7
13th Champion of Rajaat: Borys of Ebe, Butcher of Dwarves
Psychic Warrior 2/Defiler 5/Egoist 5/Cerebremancer 10/Arch Psion 5/Archmage 5/Athasian Dragon 10
14th Champion of Rajaat: Daskinor, Goblin Death
Defiler 8/Nomad 10/Cerebremancer 10/Athasian Dragon 2
15th Champion if Rajaat: Kalid-Ma, Tati Killer
Defiler 5/Arch Defiler 10/Shaper 10/Cerebremancer 5/Athasian Dragon 8