Brassa, you've left that one a bit late. You really need to rip apart that root ball. There are too many rotting roots and the damage has started to spread all up your leaves. I honestly cannot see it recovering from this. I would remove all moss - place it on some bark + perlite & spray lightly every day.
If you place it on some moss to avoid the daily misting I am afraid the rot will just spread although like said I see little hope for this one anyway.
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