This may be my biggest challenge yet! Monstera Adansonii murderer rescue

I "RESCUED" what I spotted to be a monstera adansonii out of a decorative pot (with permission lol) that was dying in my friends yard.. it was soaked from the kids watering it every day, and slowly rotting away.
It was one of those decorative plants that had five or six different ferns in it. A few different flowers, and randomly the adansonii!!

I did the best I could to remove it.. and clean it up slowly over the span of a few days.. It had a lot of rot and I had to remove sooo much.. so I've just been doing a little bit at a time.

NOW HERE ARE MY QUESTIONS
1. Now that I've cleaned it all up… I've been debating making the chop to the one branch that is hanging off the left… But it has no leaves.. not sure if I can root it in water without leaves.. I've never propped one of these before. (Don't have the space or humidity to do some humidity style, should I just leave it??)

1. I do have some Roottech gel.. that I've never actually used before because I've always been very successful with my props.. do you think it would be helpful for me to dab it in some places where the roots are damaged?..
   I'm not sure what the technical term is for the monstera roots.. but a lot of the "casings" around the roots were rotted , leaving behind these skinny ones

2 a. Another thread that I read of someone in a similar situation dipped a toothpick in the root gel and swished it in the water just to add a little "oomph" to the water .. but Google says NO it won't do anything!
– once I get this baby healthy I can chop it up further, but I could very well be dealing with a fungal thing here… It's in pretty rough shape but still lots of green, and the main stalk is still in very good condition so I'm hopeful!
Should I try this? Or dab it directly along the base of the roots?!

1. Should I just cut off these top pieces completely?? There's a lot of external damage but they are still quite green overall..

Sorry for the novel! I've always been very successful with water props… These guys are in pretty rough shape and probably in shock