What are you using to manage duplicate/dead/etc streaming channels?

I have Channels (non-docker) running on my Synology NAS with several docker containers for the playlist.m3u and epg.xml. With over 6,000+ channels, am finding several duplicate channels, No Longer Available, etc. Is there any automated method of combining duplicates, not displaying dead channels or bad links, etc.. What are you using to handle this? Thanks in advance.

I primarily use PLM for that task, which is part of the aweome toolbox that is SLM:

That helps me pare down the thousands of channels from all the FAST providers combined into a much more manageable and curated list: