I don't do dual volante combos often, only in certain situations. Usually I do volante and then 4D for more damage. Plus now that volante has move proration the 4D damage will be more important.
Besides, I still don't think we'll be able to incorporate all of Nirvana's moves like we could in CS because if you remember, the hit stun from Carl's moves were reduced. His CS combos don't work anymore. But I do have some ideas flowing throw my head right now. I wonder how practical it would be to do j.C spike and have the opponent fall into a 4D, lol.