Frey
The Frey are a race of upright felines that strongly resemble domestic cats in their morphology. They are strong-willed and clever, and quick and tenacious in a fight.
• Frey gain a +2 to Dex, +2 to Cha, -2 to Str, and a -2 to Con.
• Frey are size small, and thus gain a +1 to AC and to all attack rolls. A frey has a base speed of 20. However, if its hands are free, a frey can drop down onto all fours in order to move at a rate of 30.
• Frey get a +2 racial bonus to Listen checks and a +8 bonus to Jump checks.
• Frey have natural weaponry. They have 2 claws that do 1d2 points of damage, and a bite that does 1d3. Use of their natural weaponry does not provoke an attack of opportunity (as if the frey possessed the Improved Unarmed Strike feat). The critical threat range for both attacks is 20 (x2).
• Stinging Strike (Ex): Once per day per character level, a Frey can strike at a sensitive area he instinctively is drawn to, such as at a dog's nose or a human's groin. If the frey hits with his normal attack, it does an additional 1d4 points of damage. This is a free action that is added onto a standard attack action. This ability can only be used in a round in which the frey takes a full attack action, and its use must be announced by the player before the attack roll is made.
• Remarkable retreat (Ex): Frey get a +4 dodge AC bonus against all attacks of opportunity.
• Springing leap (Ex): A frey can jump up to many times their height. When calculating the result of jump checks, frey are not limited by a maximum distance.
• All frey have low light vision.
The Feral creature template sounds great. Changes claws to 1d6 dmg and like the 10ft to movement.
Feral applied to humanoid changes type to Monstrous Humanoid, which makes Enlarge Person not work on you anymore. This is a non-issue if you go with Psionics, because of Expansion, but Aberration type, which the Elan and Synad both give at +0 LA give access to Rapidstrike/Improved Rapidstrike at later levels, which will give you iteratives with all your natural weapons, giving you a downright scary number of attacks. IF you cannot change your race because you're already married to it, then some options open up to you.
Warblade from Tome of Battle gives you access to the Tiger Claw discipline, which has the Sudden Leap maneuver, which gives you a swift action jump check to move. Battle Jump from Unapproachable East gets you a charge whenever you drop 5ft on an opponent, depending on how you read it. It's a regional feat, but the rules do imply you can take it if you have 2 ranks in Knowledge (Local) for the appropriate region. Now if you go Totemist you can bind Sphinx Claws to your Hand Chakra and get pounce and a 1d6 claw attack, or you can dip Lion Totem Barbarian to get Pounce with any form of charge. Tiger Claw discipline has also other very nifty maneuvers for Natural Attack users, and claws are a favorite weapon of the discipline. Useful maneuvers include Raging Mongoose for even more atacks per round, and various other standard action strikes that say you Jump into an opponent (which will trigger both the strike and the pounce, depending on DM interpretation). This is a nice way to go, because you already have a WOOPING +8 racial bonus to Jump Checks, so you'll easily be able to make the checks necessary to make the jumps to trigger the charge.
Tome of Battle is very dip-friendly, and does not disrupt a Psycarnum build focused on making a scary efficient glass cannon King of Smackish build. Can't provide you with a full build right now, but see Ling Ling (
http://brilliantgameologists.com/boards/index.php?topic=1276.msg33395#msg33395 ) for an example of what can be done with Totemist + Tome of Battle. See that it's not even that much optimized and has no Psionics in it (In order to fit thematically with the Character from the show...)