Berserker CI + Forbidden rite and its mechanic

Hi,

I recently think about a very sick combo, but turns out someone actually thought about it before ( amazing!) it is Berserker CI. So, I found 2 topics talking about it here:
- https://www.pathofexile.com/forum/view-thread/2511184
- https://www.reddit.com/r/pathofexile/comments/82hhfl/berserker_rage_and_ci_are_weird/

What I want to ask:
1/ Does the "bug" is still there? I mean, do I have to spare some flat ;ife regen to counter the lose life when I have Rite of Ruin ( 9th stack, 19th stack)? I want to use my life regen apply for energy shield through Zealot's Oath

2/ Does it have same mechanic wotk for Defy Pain? At 10th stack of Defy Pain, I will expect it do to me 1 damage ( since I have maximum 1 life) means basically does nothing ?

3/ " A character loses 1 rage every 0.5 seconds after not having gained rage or been hit recently." --> Does that means if I cast Forbidden Rite constantly, I don't have to worry about that, right ?

1. Yes, this mechanic is intended.

2. You don't get Defiance at the first place since you don't lose life when hit with CI. You would take 1 damage at 10 Defiance if it was possible.

3. Yes, Forbidden Rite hits you.

Very sad to hear that. Why things never so clear with CI? With 1 life I can still be damage with "0.1 life loss per rage".... So:
- For the question #1, can you show me how much flat life regen I need to counter the life loss, suppose that nothing else damage me and I have 50 rage ?

Another question sir, suppose I have Eternal Youth key stone which means Energy shield recharge will apply for life instead, can this "recovery" support for the life loss by "0.1% of life loss per rage"?

Same with "recovery" come from "damage taken recouped as life". To be honest, I am noob and I am just reading the text here so I don't know how the mechanic work and how the hell why things so complicate with 1 HP.

To be honest, I am trying to find a way through the tree to counter the life loss from rage without depend on unique items. And for the flat life regen it will be super waste if I over invest it. Also, if possible I hope to get the "flat life regen" ( Which can come from golem, heal totem) to put on Zealot's Oath to make the build more viable.

Sorry to hear my rambling. Thank you!

If you have Zealot's Oath, you cannot have ANY kind of life regen, flat or otherwise, because Zealot's Oath will convert all of it to ES regen.