Guidelines for the number of vNICs to use under a Team for SMB storage traffic

I have a Hyper-V Cluster with the nodes each with a team of 4x 1Gb network adaptors. I needed some guidelines around how many vNICs to use under the team for SMB storage. The team is used for other traffic (Mgmt, Migration, VM), each of which has a vNIC.

I've read that you should use more than one NIC when using SMB3, but what guidelines are there for the number vNICs per team?

Thanks.