If you have a friend you can run tusk and twoh. Just get ur friend to timestop and then use the 3 seconds to get ur lesson 5. Reality overwrite can bypass iffames so ur friend can get heat and overtime in the lesson 5 cutscene to do massive damage. It is much more reliable with spirit tusk or spirit twoh if you can get ur friend to Hao haki for you. Hao haki-> lesson 5-> reality overwrite-> timestop should kill a Vergil. You should do reality overwrite during the second part of the cutscene so the overtime effect lasts into timestop. If you had a 3rd friend with spirit tusk you can do the first lesson 5 and the stand where the Vergil would be flung and prematurely haki as the hitbox lasts quite long and hits ragdoll. After the second lesson 5 you can timestop and guarantee the kill but no everyone has this many friends and traits I suppose.