Is it just me, or is Ky’veza - especially her Dark Massacre ability - a completely whack, out-of-place mechanic, when she appears in other delves?

I usually do delves with a friend. We’re not that bad. We clear tier 11 delves first week. We clear heroic raids and get over 3k in M+ most seasons.

Last week, Ky’veza drops in on us in a tier 9 or so. Everything seems to be going fine. We get an extra elite because of Brann’s whack positioning, but we can manage. Then all of a sudden, we both die - one-shot from 100% to 0 - from Dark Massacre.

???

After that, I went and killed Ky’veza twice, in her own delve, just to learn this mechanic. My friend also gave it a few tries to see it.

This week, we get Ky’veza in a Tier 8 delve again. She does Dark Massacre. I look all around, where are the clones? Can’t see them. Wham, I’m dead. My friend continues for a bit, Dark Massacre comes up, wham dead.

???

How is this OK, for a drop-in to a random delve? A drop-in that you get once per week, unless you spend Undercoins on the item? No opportunity to learn? No ability to retry?

And to do this ability - against backgrounds of random colors? With random packs that might also be there? With a number of other people, so it’s not even clear whom the clones are charging?

What on Earth are the developers thinking?

If you have very difficult one-shot twitch mechanics, you need immediate repeatability. If you don’t have immediate repeatability, you can’t have these mechanics.

???