[Ranylyn]

The thought of being able to apply a second catlyst at half power utterly horrifies me. Rebellion Blessed weapons? Noooooooo.

My vote goes to not using up the catalyst. Your expert manipulation of the magical powers allow you to not destroy the original catalyst, which quickly absorbs focus from the air around it to replenish it's powers, or something. As stated, it would make Godly catalysts far more useful, considering they cost legend inks.