Take a look at this and tell me if it's balanced. My copy of original C&T is in storage, so I'm converting this without advice.
Yuan-ti Abomination stats (human/snake hybrid with arms and hands, snake head, and body). This conversion refers to the version of Yuan ti located in Dwellers of the Forbidden City, page 27. It also uses the python/boa constrictor stats as base.
Level: 9D; Base/Rate: 30; Max Pace/MN Bonus: Run/0;
Speed MS/AQ: VS/MD; Size/Crit: M/--; Hits: 40D;
AT(DB): 3(30); Attacks: 70 SBi, 30/60 MGr, 70/90 LGr, 80 Melee/60 Missile, Spells*;
No. Encountered: 1-4; Treasure: special; Outlook (IQ): Aggressive (Genius)
* The Yaun ti are psionic and will use the Psionics powers listed in the Spell Users Companion up to their level. If the SUC is unavailable, the Yuan ti will use Mentalist Base Lists plus one evil Mentalist base list to their level, as in Spell Law.