Help me understand blood rage degen on my 2 Slayers

So I have 2 slayers that use blood rage with very different results.

One uses cyclone,the other uses infernal blow,both use vaal pact,brutal fervor and endless hunger.

After killing a buncha mobs to reach max leech (or what i think is max leech) the cyclone dude will start to lose life after just a few seconds of not killing,but the infernal dude can stand and do nothing for the full 16 second duration of blood rage and lose no life.

I cant figure out why!

Someone else can explain the detailed mechanics but this is the reason:

Small hits of damage create short instances of leech that only last a couple seconds.
Huge hits of damage create very long instances of leech that can last minutes.

For example my Earthquake slayer could leech for 1-2 minutes after killing an enemy.
A cycloner is probably only creating seconds of leech especially considering you wont be utilizing the overkill leech mechanic that much.

And if you didn't already know, your slayer leech persists after reaching full life and will prevent blood rage degen for as long as it lasts.

Thanks for clearing that up.

Im kinda new. In maps i have this problem where if i die and re-enter a map i'll die from blood rage cuz there are no mobs for me to hit on the way to where i died, is there a waay to combat that?

u should just not press the button or if it's automated, deactivate it until u're in fight again.