To clarify, if I was introducing someone to the Diablo series for the first time and told them they’d have to start on the first one. I wouldn’t want them playing the bare vanilla version. There is a Bezelbub mod out there that gives the game lots of QoL improvements, you’d be thinking you’re playing a build of Diablo 2 before its final version.
So, if I had to tell anyone what the best way to play that game would be, it is the Bezelbub mod. That was how I’ve beaten the first game anyways.
For Chrono Trigger, definitely don’t play the original SNES localization. No disrespect to Ted Woolsey, he was one man working on an unreasonably tight deadline and hard technical limitations, but the retranslation is much better.