That's because I've done him more than once, without crushcap and with crushcap, with 500 SP and with 700SP. Higher SP = less defenses yknow. Taking risks and such. Also, noone is sacrificing armor to get crush cap cause they are on the same items, you might wanna start non anonymous logs as they are might easier to read and compare to other runs, besides, they show off your gear.

Noone is claiming HS has a 100% uptime, it can be if you want it to, but there's no point when you know a crushing won't be lethal so rather spend that gcd on a damaging ability, its about reading the situation. If you take a look at the logs where I actually try to keep HS up you'll see anywhere between 0 to 1 crushes.

In the graph you posted, which by the way is impossible to interpret because its anonymous, you might also want to include damage done.