People who make their own idgames mirror, which ftp client do you use?

All the major ones seem to be only downloading a single file at a time, coreftp can do several downloads at once but hasn't been working well for me lately, it keeps asking for my anon login for every single download. Offline explorer is missing half the files when that tries.

You could pre-seed your mirror with a dump from here https://archive.org/details/idgames.

If archive.org is not fast enough for you, they supply a torrent file too