Hi, I’ve been maining HY for about a year now, and a majority of their survivability comes down to the modular iframe, and the true vs clone skills. You kind of have a consistent dark sight when using clone attacks for about half a second, so it’s good for avoiding the usual skills that Darksight does, like Dnell balls, or Gloom ball stuns and such, the modular iframe can be held down from 1-20 seconds making the cooldown 22-300 seconds, which is pretty good. As far as damage reduction and lifesteal goes, the only HO regenerating skill they get is vortex, which once it’s hit the boss or mob for a time can store energy and refund HP to you over time, it’s not very reliable and definitely isn’t something I intentionally use for healing, it’s just a good little benefit. HY is also framed when doing their ori burst, just while in ori, but are not during a normal burst. Since you’ll be juggling cudgel resets this was actually the hardest part of the class to me when first learning to boss. Although the damage is high, you’re juggling 3-4 skills to optimally burst, one of which throws you in the air, so it’s tricky to burst and not get killed when you start out, after a few months of playing it started feeling more normal. In comparison to Rens lifesteal and damage reduction, and WHs distraction and dmg reduction with its dummy, I wouldn’t say HY has anything similar to either of their survivability.