Wrong place to ask, anyway, if you don't feel confident with 4-5-1v then any 3N-1 can counter that 4-3n-1-2, like :

3-5-2v, 3n-1-4-2, 3n-1-5-1, 3n-1-3n-2wam-1

Even 4-3n-2wam-1 also work (mid mc down arrow)

Good luck