I don't understand your answer
Unfortunately there are a lot of spam bot posts that get made on the forum.
The idea is they take a popular post on reddit, that was (presumably) written by a real person originally and won't be detected by spam fitlers, copy/paste it it here, and then a few days later after it's gotten some engagement edit the original post to put in malware/phising/advertising
The bots accounts here tend to either have brand new join dates, or be 2+ years old and have never made a post before.
You fit that profile, and the mods were suspicious
As to your question, the amount Wixwel grows shields is a percentage based on howw many buffs the champ has. Looking at the rest of your team, I don't *think* thats the issue.
You *might* need higher defense, if the demon lord is damaging the shield too much for them to grow sufficiently.
Other than that, I'd need more information to give a better diagnosis.
If you're not blocking or removing the stun, then 100% your runs will mess up, because there's no guarantee at all who the boss will target. Green especially will be a problem, because not only will the boss likely stun Wixwell, but he'll also speed down your team.
You should replace Mithrala with someone who can place Block Debuffs on your team. Brogni is a great choice if you have him.