Yeah I forgot what the gap was, it'd just be Multi Continental+, but yeah, Welt is able to power God Keys (big surprise its totes like he didnt use god keys before hmm) and Welt isn't even at his peak either way, he was sick from what I remember (or was that post 2nd eruption), also yeah we did agree on the microcosm thing, I'm just saying it as backing evidence that Welt should have that amount of energy.
Also yeah, not all of the honkai was neutralized, just most if it, like, most of the structure of honkai was obliderated from the area, but there was still some of it left.
But basically, my point wasn't what tier Welt scales to, I'm just saying that even the 1st herrscher is able to do whacky things despite supposedly being the weakest in terms of honkai energy amount. Tho as for the tier I'd put Welt at I'd say "Large Country level (or whatever it was that Siberia ranked at), potentially Continent to Multi-Continent level, at least continental level with star of eden, potentially multi continental" or something like that
As for Joyce, Joyce should be much stronger since like, literal WOTH praised Joyce to no end.