Just because it’s wider doesn’t mean much
it’s still comparable to giant Luffy which is easily the size of Lokis tooth
“Loki amped his attack with acoc”
and this is supposed to mean his attack was at its peak here? We know he held back as to not completely destroy elbaf and this was some blast breath lol.
And for your last argument
it’s not impossible but based off of calcs yes thorheim is bigger and it will remain that way maybe until enel comes back
so far now elemental ability wise loki>enel
Also loki has a bit better feat than thorheim that is larger than elbaf and that he did with a seastone chain on and while heavily attacked