[@Dymion]
Well I'll make three things clear before I post my opinion. If these are fine, then I'll explain how I personally view the tiers.

1: I'm incredibly abrasive, my opinions are full of personal bias based on experience. I'm also a salty fuck, so generally the way I say things comes off in a way that makes me sound like an asshole. (To be fair, I am an asshole.)

2: I believe that guns don't increase the tier of a character alone, I think the premise that a gun is a terrifying death sentence among superhumans is stupid. What I do believe, however, is that equipment and training can shift the tier of a character. A gun equipped to Norman McAverage would be horribly ineffective against Captain America who's ready to beat the shit out of Norman.

3: High tier characters are about the only thing that's agreed on, once people reach a certain level of ability it's noticeable that they're high tier. And people will call you on it, especially if you're classifying them as a lower tier.