Veinmine has a lot of options. I like the Alt-click BOOM! to mine the whole vein at once, but there are other options you can enable if you don't just want to explode the whole node at once. You can turn on the Progressive mode, Spread Damage, Radius, and adjust the damage type so that you harvest slower but still eventually get the whole node mined.
It does all the things you want.

https://steamcommunity.com/sharedfiles/filedetails/?id=2926661784