Heyo! This is a small little guide to how you can get LRT to work on Blitz.

What I did was go into the LiveSplit properties for the loaded splits (regular Borderlands Any% or All Missions), but for LRT on Blitz, set your selected character to none (shows up as empty space). Save it as a separate splits file afterwards.

To get this working, I also play on the GOTY version on Steam (For some reason whenever I install it outside of Steam, it never seems to work)

In this way, you have working LRT timing with any custom character, really. If you then get a run that seems good enough, you can edit the splits by changing the category to Borderlands Modded Classes Any%/All Missions, then selecting Blitz as your custom character.

Save that as a separate splits file for uploading runs, and there you go! Working LRT for Blitz.