Opening Bags
https://silverwastes.loltools.net/
That site gives the average player the best guide to which level toon is the most efficient, in terms of profit alone. As long as I’ve tracked it (using my own calculations, that take into account a few other things), L53 is always a very good choice, even if it’s not the best choice, i.e. it’s always within a few percentage points of the best one.
Incidentally, the profession you use doesn’t matter. (To the extent that it might conceivably change anything, the effect is much, much smaller than the choice of L53 over L80.)
tl;dr L53 is always better than L80 and always “good enough”.
John Smith: “you should kill monsters, because killing monsters is awesome.”