[Dehitay]

the only way you can gain 9 levels within an hour is to have saved up a incredible load of rubies, torches, and sulfur
the fact that he waited for a single day to do it is no different than having gaining 9 levels in the number of days he was aquiring the items
Matter of fact, I think it's actually harder to do it all at once
it's not doubt tedious as hell
and I believe that your chance of succeeding in that spell actually goes down if you keep doing it over and over without increasing the time interval you do it in

As for the "insane" amount of exp you gain
It's available to everybody
and as you get farther along, you need bigger ways of levelling
How would you feel if you got to a high level, need 1.5 M to level up and all you could kill were shell bomies?
the fact that new players can catch up to higher levelled players with the spells only means that the new players are putting more effort into it
higher level players actually have the advantage since they have a higher mental level and consequently, a higher chance of success in that recipe