How I can create a death after the end of my health in UE 4.18

you dont show health at all here but id guess you have a similar script as your armor right? if thats the case then you would just check health <= 0, if true call death event, if false do nothing.

also doing systems like this on tick is not a good way to go about it, you would be better to check health only when health is changed.

You can do it like this