Preventing Win10 Upgrade from Writing to Clover EFI, Any Suggestions?

I'm overdue for a major upgrade to my Win10 installation (Dual boot: Mojave on the NVMe card, Win10 on a SATA SSD), but due to my slow internet, it's more convenient for me to do a "upgrade in place" with the Win10 installer ISO downloaded elsewhere. The problem is I want to avoid some problems that I had experienced with my previous Hackintosh (Yosemite and Win7 on separate HDDs).

I want to prevent Win10 writing to the EFI on the OSX drive; the Win7 installer put the Microsoft EFI on the...

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