Watch the Go Sweep the Four online guitar lesson by Jennifer Batten from 50 Ultra Intervallic Guitar Licks You Must Know
The descent has a couple of tricky moves where I play 4th intervals in groups of three. To get it clean, I use separate fingers on each string. I sweep down to the root with a minor 7th arpeggio. I play perfect 4ths leading into the final a mi arpeggio.