It's for sure not AFKable. The best I got it run (with similar specs to yours) is for about an hour before something halts it, either D3 freezing or the bot throwing errors.
If you want to babysit it while it runs, then you can probably get it to work, but it's nowhere near the masterpiece that it used to be.
And yes, I'm talking about the latest version that they have out right now.