Bunch of questions. Mods forgive but some just requiring mentioning other products. If this is bad let me know.
On the macrium question. Some of the ransomware I've played with will in fact encrypt the images and if that happens bye bye
I wrestled with how to protect my 2nd and 3rd internal drives. Many of the ransomware programs don't protect them. That is a fatal flaw. I finally settled on Pumpernickel(FIDES) as the solution. It locks changing files on the disks, but I can specifiy that certain programs can make changes. Cheap, only $13US. Big down side is it's only a driver controled by an ini file. EVERYTHING is manual. But it works.
That protects the images, so now the c: drive is a restore issue only.
As to what Rollback will do, I don't know. I won't use it as I don't trust either the software or the company. I don't like what it does to the imaging situation either. I don't believe there is any way to put Rollback on key. On there similiar in concept program is Raxco's Instant Recovery. While it could be used if your images are protected. It would be very unwieldy and time consuming.
What about all these new Anti Ransomware programs. To me a big Blah. By the time any of them detect anything YOU ARE INFECTED!!!. If that happens the smartest move would be to have an image to restore, in which case the use of these programs and is to me at least a waste of money