Hi everyone. I completely agree with you about increasing the boss kill attempts without having to go through all the floors again. And as I already wrote in this topic Last Wisper in crucible. you can simply add a whisper checkpoint in the boss room, which will not allow you to teleport to the city (due to the fact that we are in other realities 
), but will only allow you to respawn in the boss room. This way we can study the boss and maybe even kill him, and only then refresh the run again by spending 1 spark. At the same time, you can always die before reaching the boss, which will prevent you from accumulating sparks.
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