Act 6.2.2 Sinister Boss Barely Taking Damage

I had several attempts recently trying to do my initial completion of Act 6.2, yet I was forced to stuck at 6.2.2 Sinister boss since Mr. Sinister barely taking damage.

Here are some game play videos I recorded showing the issue:

https://drive.google.com/file/d/1XWfmDaip-ZDEq9EOXIxHRYZzLB_wdUCA/view?usp=sharing

Still the same issue after a device restart:
https://drive.google.com/file/d/1deW4N8cixiSjEG_5axIYNSVGBag2IyLO/view?usp=sharing

My mastery setup for the first two videos:

Two weeks later on the latest update of the game, still the same issue:
https://drive.google.com/file/d/12y2eS3hf6teL9p7lPZ6VovBF4DO8IXMp/view?usp=sharing

My mastery setup for the third video:

The node description on Mr. Sinister:

My device is iPhone Xs, iOS 13.2.3.

Is anyone encountering the same issue as I did? Is there anything that I'm missing?
I think this should be a bug? And if Kabam isn't going to do anything to fix this, I'm gonna stuck here forever - no further progression allowed. And please correct me if I'm wrong.
(I tried to contact Kabam Support with all these info and looked for help, but they somehow couldn't get my reply via email... So I hope the forum post could help me...)

Comments

Madcat

You MUST have a Fury buff to do any reasonable damage. Are you triggering the Ang/Heim synergy buff?

naikavon

What madcat said above except I'll add, ACTIVE fury buff. Capiw has passive and won't count. Watching your vids I never saw triggering of Heimdall-Hela-Angela synergy so without that you'll never get sinister down. Ever. Sorry bro but you'll need to exit out.

Prentex

Can you share your roster?
Good options are for example (if you have Heimdall and Angela or Hela for the fury buff): Cap IW, Gladiator Hulk, She-Hulk, Red Hulk

Helpful In general:

Champs that don't have a lot of buff because of the EMP node, when he throws a special attack you get passive shock damage for every buff you triggered

Poison immune or shrug off / convert poison (like Ghost, Red Hulk)

Heal block is also helpful (like Gladiator Hulk with sp1)

I don't have Heimdall or Angela/Hela so i used Ghost with Hood synergy. You get the active fury by throwing a heavy attack, i did one hit - phase - one hit - phase combo until i reached sp3, if you still have the fury buff then throw sp3, if you don't -> throw a heavy to get the fury buff and then sp3, it worked pretty good but still i had to revive like 4 times every run, that's because i am not the best Ghost player lol

unknown

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