Jdownloader2 is a god send when dealing with crappy file hosters.

If you mean general download managers, then IDM hands down. It's so good that I bought it just to support the devs. Then there's JDownloader 2 however it's quite heavy for everyday use. It is a must if you use debrid services though.

If you mean direct download: JDownloader2

For torrents: QBittorrent

For usenet: SABnzbd

Do you mean torrent clients? If so qBittorrent or BiglyBT are very good

Vuze has always been good to me though I don't know if it is strictly "optimal."

I have been using idm for as long as I can remember.

I've been using Xtreme Download Manager for a long time. It's lightweight and has a browser extension, so it can easily intercept links. Some websites can't be easily intercepted by it, so I use JDownloader2 instead for that.

Xtreme Download Manager

Kget works pretty well for http downloads.
Use Qbittorrent for torrents

uuu now I wanna know all ur tricks op on mobile how you do it pls? recently discovered 1dm app.

I use Internet Download Manager and it has worked like a charm for me. It's paid, but you can find the pirated version easily!

I tried JDownloader but it didn't work for me, I'm kind of dumb though so it might have been my fault that it didn't work in my browser/computer.

Edit: wanted to add that for torrents I've been using Qbittorrent, imo it's the best

Thank you guys for the recommendations