I recently took a few old cacti off some friends who no longer had space for them. They were all over potted, and had been in damp peat/sand mix any left in the rain out on their lawn. I have been processing them one by one, but I'm unsure about how to tackle this one. It's a bit light deprived, and is all droopy and floppy, with the individual branches resting on the edge of the pot for support (the soil level is pretty low in the current pot).

Any opinions on how to make this look good in a new pot? Should I Plant it deep in the new pot so it has support for the branches, pot it up normally and try tying up the branches, or would it be best to pull it apart and reassemble in new mix, rerooting branches? I'm pretty sure there's no rot, and I plan to put it in gritty mix.

Just any advice on how to tackle it would be appreciated. It's impressive to look at but its a bit of a mess and I want to make it look nice. Thanks