

I did this a few years ago.
Maybe the best option is to create an entirely new prefix in Heroic and install battle.net via their “run installer first” button. Via Winetricks GUI you can install the 2 fonts or whatever that the lutris script installs.
Then, copy the game files of StarCraft 2 or WoW or whatever to the new prefix program files.
Then, in battle.net, it will either auto-detect the game, or you can go through the “search for games” flow in settings.
That should work, it is always better to have a fresh prefix as it takes almost no space. Once everything is copied you can simply delete the old one.






I always do LVM now. Virtual partitions are the way to go, personally.
The amount of times that the root partitions have been 20-25GB but have still gotten completely full such that updates break… Well I could count it on one hand but still difficult enough that I would rather just use virtual partitions, especially on a server.