I did one ssf today up to lvl 125 and Baal.
Clear speed is nice, lacks a good single target skill, overkill isn't super reliable against moving targets.
It took about 6 minutes to kill Baal with overkill because he decided to summon 3 Diablos.
I used mostly stampede in the playthrough, with an occasional overkill on stationary targets like the k3kba totems.
This was in tiered uniques with runeword Erawan armor and Kodiak axe, random crappy jewelry.