I spent 4 minutes watching Sauron killing people in your gif, wondering how many more people he can kill.
That's pretty much how a bane spider played if you had a force-feedback proc on all of your attacks. Moreso if you fully IO'd it at 50.
As to idle farming purples - could do it in RV with a heavy but you had to move too often to make it truly afk. And obviously you had the same drop rate as the normal game so it wasn't particularly worthwhile.
I would often baffle my guilds, as I essentially had a purple drop rate of at-least one every two days. Clear all my alignment stuff at +1x8, run some newspaper missions, if one dropped, head to the market, and sell it off for 500mil, then go to Pocket D and bum around. Once that sells, use the INF to fund another character's build.
I usually fought Council when I could, as they spawn a -lot- of dudes, and aren't that tricky mechanically. Though, my Warshade, Crab, and the Plant/fire/fire Dominator were pretty much unstoppable, so they could pretty much handle anything the job lists offered.