I’ve looked around a little, and found some mentions of using Lutris, or running it through Steam (tbh I don’t know how that would work), but I’m not really able to find any guide that explains the process well enough. I’m so used to the game being handled by Blizzard’s Battle.net launcher, so I can’t really wrap my head around how that would work.
wine-ge-8.26 is quite old now. Get the latest one, 10.something, and see if it solves your issues. Can’t remember how you update Wine/Proton in Lutris. Protonup-QT is a great helper to get newer Wine versions for everything.
It’s been a while since I have been messing around with Lutris. But the general way of installing WoW or any other thing is basically the same in Lutris, Heroic, Bottles, Steam or Wine without any helper. Though I would advice against using Steam because it creates a new prefix for every new exe you throw at it, unless you tell it otherwise.
Common problems (don’t remember if they apply to Battle.net) are that you need to install the Visual C++ Runtime (vcredist), .Net Runtime and some fonts. You can do that with Winetricks or downloading the respective installers from Microsoft. You usually don’t have to install all fonts, that’d take a long time. Arial or maybe Helvetica are usually enough.