TSR should have orings for Tekno soon, best shock orings I've run in any car they make them for.
They usually have a club orings that's a little less stiction than stock but zero leakage. Then they have a pro orings for those that don't mind a little more maintenance and a little leakage for the least possible stiction in your shock.
I go with the club orings just cuz I don't earn a living at this but those that are super into it may want to check out the pro orings.