Now to a more difficult question... While I do believe Matthew Malloy can be given a profile considering he was extremely important for a time to multiple characters when he was canon, the issue is where exactly to tier him and who to scale him to ? I think we can scale him really high to be honest.
Firstly, even when Matthew was a Child, Charles Xavier firmly believed no one he knew could stand up to the power Matthew was unleashing and that he was a threat to the entire world, the Avengers included. It even showed Jean Grey , Hulk, and several others getting instantly destroyed in Xavier's view of what would happen to them if they encountered Matthew. Charles Xavier even doubled down in saying Child Matthew held more power than any he had ever faced, confirming his supremacy over everything Charles knows of , describing his destructive power as turning the entire world inside out.
Malloy has several goat quotes at the time (More powerful than any mutant the X-Men had ever seen, a power so great none of us can even hope to understand, is a power no human can ever hope to control, etc ) , Maria Hill heavily implied sending the Avengers was something they absolutely shouldn't do, implying they'd get murked.
Based on all of this, I genuinely think Malloy is 1-A. Even as a Child Malloy was > Anything Charles Xavier ever faced or known about, and he got even stronger as time went on as mutants tend to do and as was proven with how his powers developed even with all of the psychic inhibitors to them Xavier put. His powers disregard the laws of physics, time and space, as well as being superior to every other mutant ever known by the X-Men at the time. It all seems really blatant to me.