Do you have access to Call to Duty or forgotten Heroes paladin?
They have good ones based off the paladin aura and other neat effects.
If you are limited to core I would say you can't go wrong with improved initiative no matter what your fighting style.
If you wear medium armor in the field endurance is good to sleep in it (and I think it will work with mithral heavy armor later).
Alertness so you have some guard skill.
Skill focus so you are good at one of your two class skills.
And three from the 3.5 psionics srd feats section
HOSTILE MIND [GENERAL]
Your mind recoils violently against those who use psionics against you.
Prerequisite: Cha 15.
Benefit: Whenever you are subject to a power from the telepathy discipline (regardless of whether the power is harmful or beneficial to you), the manifester must make a Will saving throw against a DC of 10 + 1/2 your character level + your Charisma bonus or take 2d6 points of damage.
The benefit of this feat applies only to psionic powers and psi-like abilities. This is an exception to the psionics–magic transparency rule.
Special: You cannot take or use this feat if you have the ability to use powers (if you have a power point reserve or psi-like abilities).
MENTAL RESISTANCE [GENERAL]
Your mind is armored against mental intrusion.
Prerequisite: Base Will save bonus +2.
Benefit: Against psionic attacks that do not employ an energy type to deal damage you gain damage reduction 3/–. In addition, when you are hit with ability damage (but not ability drain or ability burn damage) from a psionic attack, you take 3 points less than you would normally take.
The benefit of this feat applies only to psionic powers and psi-like abilities. This is an exception to the psionics–magic transparency rule.
Special: You cannot take or use this feat if you have the ability to use powers (if you have a power point reserve or psi-like abilities).
OPEN MINDED [GENERAL]
You are naturally able to reroute your memory, mind, and skill expertise.
Benefit: You immediately gain an extra 5 skill points. You spend these skill points as normal. If you spend them on a cross-class skills they count as 1/2 ranks. You cannot exceed the normal maximum ranks for your level in any skill.
Special: You can gain this feat multiple times. Each time, you immediately gain another 5 skill points.