I did a quick peek and it seems you’re right and this won’t help with your problem. Better remove that entry again to avoid it having any undesirable side-effects.
According to WineHQ.org the game should be working with 2.18 staging
I just did a quick test and can verify that it does hang on map generation with wine staging-2.21-x86_64 and that it does start into the game with staging-2.18-x86_64. So your best hope for now is downloading wine staging-2.18 and configuring Wine Steam to use it.
You might need to reinstall your Wine Steam into a 64 Bit prefix first as Lutris seemingly no longer provides wine staging-2.18-i386 through the “manage wine versions”-menu.
I’ll try to add a second Endless Legend Installer that uses a 64 Bit wine steam prefix and the mentioned wine version. Once the change is though moderation Lutris should once again be able to install the game in a working manner.