Nyzul Isle Uncharted Alternate Progression Systems

I am aiming only to ask the playerbase what they would prefer to see this work like. I'll keep it simple. I have only included options that, at this point, we are sure do NOT exist.

1. Bosses on the 20/40/etc floors give 3~5 min time extensions.
   
2. Lower level equipment obtained from bosses can be traded once (and lost) to start from the floor following that boss' floor.
   
3. Equipment is directly upgradeable via Magian trials by exp-ing in Nyzul Isle Uncharted.
   
4. Equipment is directly upgradeable via Magian trials by collecting multiples of the piece.
   
5. Other

I have opinions on the gameplay result of each of the options, and guesses as to how hard they would be to implement, but I won't lengthen this post with that, probably in a few if anyone cares to answer.