Just make a powershell script file (assuming you are running windows) that does it in one click and another to revert back to desktop mode. (takes literally seconds and could be done from the couch by running from steam as a nonsteam shortcut)
If you want I could make them for you but I would need the following information for each monitor:
-Arrangement (if three monitors, get the monitor number e.g I have 3 2 1 instead of 1 2 3 (too lazy to rearrange them)
-Resolution of each monitor
-Monitor frequency (eg. normal monitors are 60hz, gaming monitors have 120 or 144hz)
You can add me as friend on steam, we could upload the code to my gitlab so it would be available for others too.
3-4 way haven't ever been useful in gaming anyway. Its just for the "look what I can do" overclockers/benchmarkers. I don't understand how this is even news other than there is no hurdle for the key now to unlock it sounds like its just unlocked?
Actually Crysis 3 and Sniper Elite 3 did really well with 3 and 4 way.
My comment was the fact that I think it's weird that they're bothering to make SLI profiles for benchmarks at all.