Is it possible to keep Decent SE on Gloves active with another glove?

Yes, the method of "glitching" decent skills so you get to keep them even without the equip is gone.
However, as far as I know, if you wear the SE glove and cast SE, the buff stays on until it times out normally. After that you need to swap gloves again, cast it again, and swap back to your fighting gloves.

hrm so say if I wanted to boss
I can cast decent SE gloves
Switch to my fighting gloves (in this case my RHC)
The decent SE will stay until timer runs out

repeat?