Not from what I understand how the wiki works, you’d need a 7.5x AP advantage since one shotting a character has vastly different standards across verses, hence why the wiki made the rule.
But even going by this standard this means that Yang can tank one shot level attacks no problem since she along with characters similar and weaker than her have tanked attacks that have one shot those who are relative to them. So Howitzer impact wouldn’t do much to her.
Yang actively uses her semblance to boost her in the middle of battle which can be seen in volume 9. Yang absolutely does have the mobility and maneuverability just as good if not better than Bakugou
In fact, when have we seen Bakugou be able to traverse such open and large distances as easily as Yang has done even as a first year?
Yang can quite easily deal with things like stun grenade actually considering she has extrasensory perception listed on her profile which allows her to sense things with her aura.
His huge AoE attacks need sweat buildup to perform, which was my point. Meaning these attacks can’t be done consecutively, especially since doing huge attacks continuously puts a strain on Bakugou’s own quirk as well. A 2x AP advantage with his best moves isn’t gonna be keeping Yang down, especially considering part of that semblance is about absorbing that damage built up and then sending it back with her own force applied as well too.
And considering she’s shown to have greater levels of maneuverability while in the air, being able to traverse much farther distances in a much shorter time frame than Bakugou, she can comfortably avoid many of Bakugou’s attacks while simultaneously building up energy from the attacks she chooses not to or is unable to avoid, meanwhile Bakugou will continually lose more and more stamina because of the constant usage of his quirk with having no other huge attacks to fall back on once the sweat he’s built up and carried in his tools is all used up.
He basically becomes easy pickings from there since Yang will have multiple amps stored up to close the distance and completely dominate him from then on. Hell the lifting strength difference between the two already ensures she could crumble him like paper already as well. He’s actually dead the second she’s able to get in close, which she can very easily do by just having Bakugou tire himself out.