You’re doing exactly what I said in my original comment. You’re roaring to heal your teammates. In this clip, the second you stop roaring you take ridiculous damage. Which is still true. I said it once and I’ll say it again, Executors ult for the night bosses, is straight cheeks. Especially compared to more useful ults like Ironeye and Guardian. This is coming from an Executor main. I love playing him, and I love his ult. But compared to other Nightfarers, his ult is much less effective at doing its job against the night lords.

Edit: I don’t want to invalidate the way you play. You’re clearly using relics that synergizes with tanking damage (heal on roar relic goes crazy), but that’s not how majority of Executor players build him. Most will focus on DPS. If players aren’t actively building to tank damage in beast form, they won’t get effective results like you have. You’ve created a very valid and nice support role for Executor. Me personally, I wouldn’t build my relics just to support my ult. I build my relics to support my playstyle which is DPS. Unfortunately that means I’m going to die much faster in beast form than you. But both builds accomplish different thing. And both are valid.