Could a method of restoring TP for Paladin be implemented?

Warrior already has one that can be used very easily, and Dark Knight doesn't always use TP (they can use MP draining moves like Unmend, Dark Passenger, Abyssal Drain, Unleash) and other abilities use no TP at all (Low Blow, Reprisal, Plunge, Carve and Spit).

Paladin lacks any way of sustaining their own TP outside of standing still and doing nothing or using Clemency. Maybe a possible solution would be to make Sheltron restore TP similar to Equilibrium but only if you're in Sword Oath? Or make each Shield Swipe restore TP.