Backup Exec 15 V-Ray and GRT backup of Exchange 2010

I have some further questions regarding Backup Exec 15 V-Ray and additional licenses.

Let's say I have two ESXi 5.x or 6.x host in a VMware Cluster environment, which are both part of a VMware vCenter. Both ESXi hosts have 2 CPU sockets with 6 cores each CPU.

Each ESXi server hosts ...

1x W2K12R2 Domain-Controller, 2x W2K8R2 server with Exchange 2010, 2x W2K12R2 File Server

So in total, these are 10 virtual machines, 5 VM's on each ESXi host.

I would like to make a backup of each VM with Backup Exec 15 V-Ray including GRT for AD and Exchange 2010.

If I am not mistaken, I need the following ...

Backup Exec 15 V-Ray Tier B (per CPU, 8+ cores) with a Quantity of 4

Backup Exec 15 Agent for Applications and Databases with a Quantity of 6

Is that true? I need 6 Agents for Applications and Databases for the 2 Domain Controllers and 4 Exchange Servers to be able to do a GRT restore?

Thanks in advance,

DiWi