Lol for Mir and a Remastered Diablo 2?
Can't say for sure without Diablo 2 RM being out yet to gauge the drag it has on resources, I can't imagine it would be very high, but I probably wouldn't even go for "Gaming" at all, you'd be bent over simply for buying anything with the word "Gaming" in it because companies are constantly trying to fleece gamers for more money.
But for the record, stay away from Spectre, they are absolute piss. Bought a bunch for work, and all but 1 one them have died within 2 years. Same for Asus
Dell is pretty solid, but as said..."Gaming" just brings an unnecessary price tag because of the GFX Cards they install which you won't need lol.
Processor/RAM is debatable. I would say at minimum i5/16GB RAM and NVMe storage of latest model available. i7/i9 if you want to spend the extra for safety, out of not knowing the resource requirements on Diablo.