WoD isn't really ideal. Main problem is that you have vampires and mages alrady made, but they are different to the point where you change so much that you would be better off just making everything up from scratch . Good thing is that you can refluff werevolves as spirits.
Your best bets are either something so simple it might as well be freeform, like d6 systems, and point buy systems that use special efforts or fate points, or any speshul snoflake mechanic that lets people shine.
You could propably use even d20 modern if you built the whole thing from ground up. From what I've seen though:
Mutants and Masterminds are sufficiently diverse. Maybe too much, you may have to ban stuff, then again you have to ban stuff in M&M all the time. But no matter what, it will get wonky on high/servant powerlevels. Maybe that's what will make it just like Nasu though.
FATE works great with Holy Grail Wars but not much else. Exalted is also great for high powered games where you've got stuff like servants, and you don't even have to houserule too much, but it also suffers on weak characters.
Dark Heresy edit like Adeptus Evangelion would help you create most of what you want but the system is complicated and broken at math. Then again, it was never meant to be balanced anyway, so go for that if your friends don't mind being strong or weak and can play DH well enough already.
Finally, you can heavily houserule Riddle of Steel and bring it into modern age. Great for a campaign at low power, with mage apprentices with tiny crests helping knights and psychics doing groundwork. Paradoxiclly, RoS has possibly the best system you can wish for to represent thug lyfe magecraft.