Does seem a bit complex.. are you sure you need to do all that? My own torrent clients (including Deluge) seem to work fine with queuing disabled and everything set to unlimited except for global connections maximum. In other words configure your global connections to whatever number works for you and your network & let the torrent client automatically manage everything else. You can also configure the Download/Upload maximum speed if you find your Deluge is maxing out your network bandwidth (and/or enable the Scheduler to do the same thing per day/hour).

Another alternative - if you think the issue is the amount of torrents - you could try running multiple Deluge instances / multiple torrent clients & spread the load that way. Definitely doable with Deluge, you essentially run multiple deluged processes each pointing to their own settings folder & then connect to any of the running deluged processes via the Deluge thin client. Take a look at https://dev.deluge-torrent.org/wiki/UserGuide/ThinClient or search around for more info on that.

If you use the Label plug-in, you can edit the label options to set queue settings and to auto-apply that label to specific trackers. The queue settings are ratio, not time tho.

Ya, your problem is exactly why I switched from deluge. It's just terrible at running more than a few hundred seeding torrents simultaneously. ^^;