Would it be easy for any talented modder out there to give this a try? The exact amount of regen given per point is up to discussion but would obviously be a very small or percent-based value.

One thing about Grim Dawn (another great Diablo-like action-RPG) that I enjoy a lot is how it auto-regens your health after you're out of combat for a bit, giving the mechanic a sort of "second wind" that isn't just spamming potions. I would love to see the same for Torchlight and I think the easiest way to mimic the effect would be to add very small HP and MP regeneration passive bonuses for the Vitality and Focus stats specifically - even better than Grim Dawn, that approach would also let you "customize" how much sustain you'd get by investing in those attributes!

I would try my hand at this myself but I know literally nothing about Torchlight modding and I'm on Linux so GUTS won't even run, as far as I know :P would be very thankful if someone out there is interested in giving the idea a try or discuss its merits here.

I know that one of the LAO mods reworks how the base stats work so I'm imagining and hoping it should be a relatively easy thing to accomplish!