Yep. I just sort of stumbled on the combo because I had Diafine (mainly for use with Tri-X) and wanted to shoot Pan F and get a bit more usable speed from it. 64 looks a bit thin but mostly prints nicely. By all means experiment with one roll to dial in your own speed but most folks find the box speed optimistic and Diafine will at least get you that.
Pan F is a nice film but can build highlight density pretty fast. The compensating effect of two bath helps.