The A5S dummy is definitely doable in pre-3.2 gear. I've beaten it at i209 with the relic spear @660 ss. You gotta be quick and on point with your rotation and facing direction. It's a very close shave though. You need about 1485.333 dps to beat it, and I was usually hitting anywhere between 1484.5 and 1486.1 on my early attempts with no gear upgrades.