Moving Windows7 Partition

Hi Everyone - I want to put my MacOS and Windows7 Boot partitions onto a single SSD in my 2008 Mac Pro. I want to know if it is better to clone the Windows7 drive, partition then install Sierra on the other partition, or if I should install Sierra first, create the partitions and then clone the drive over.

At the moment I have El Capitan and Sierra on partitions on an SSD boot drive and Windows7 on a separate boot drive.

Thanks in advance for any assistance.