Is there any word from the devs on Linux support? The game looks extremely promising and I'd pre-order it if Linux support was confirmed.
I don't know nor care about Lutris itself, but here's how I do it, just tried setting the prefix again for a step-by-step:
1) Create a 64bit prefix.
2) Install .net 4.0:
2.1) Set Windows version to Windows XP.
2.2) Run the dotnet40 installer (best to just grab the one winetricks uses).
2.3) Override mscoree.dll to native.
2.4) Set Windows version to Windows 7.
2.5) Run the dotnet4.7.2 installer (same idea: grab the one from winetricks).
3) Install the BSG launcher.