He'd probably make a run to Starbucks, buy some coffee and do the first chick he saw. 5000 years is a long time without it.
Seriously though, he'd probably have done one of either two things.
1. Attack the Jedi Praxeum head on and most likely lose. I think he could certainly take Luke in one-on-one at this point, but Luke's going to have a lot of backup.
2. Ragnos rebuilds the Sith Order in secret from the Jedi until it is large enough to defeat the Jedi Order and then kills them.