took me like 5 minutes to do it.
made a crusader, gave him a corrupted ashbringer with socket. gemed of ease it. cubed the executioner. run faster paragons.
put a horse on skill bar.
win.
the achievement description made it look much harder than it actually was.
Brings back memories of the good old days in Diablo 3 and RoS where boss fights would drag on and you’d have to fight and kite to win.
Enjoy it while you can. When you have a build that can run T16 fast you’ll start to one shot bosses. But then the challenge will be in greater rifts.