Btw. someone has feedback on how much the rubberband helps for actual play?
It helps a lot. SOOO much less grinding. It does sort of "punish" players if the player decides to not catch up the level and plow through the dungeon for the higher level enemies in the next dungeon, because the players would run out of money for the weapon/armor before fighting the said higher enemies (which will get you killed, or at least have you use up items). Luckily, hmsong's less grinding gives a bit of surplus of money, but not enough to offset the "dungeon skippers". And that's a good thing, imho, because it encourages players to catch up a bit before moving on.
Btw, it's not exactly 25%, 50%, and 100% (not that I'm complaining -- just reporting something I noticed). For example, for Lampflower Mega Crawler, vanilla Lv22 drops 115 exp, Lv23 drops 129 exp, and Lv24 drops 145 exp. If I were Lv21, then Lv22 drops 144 (+25.2%), Lv23 drops 203 (+57.3%), and Lv24 drops 286 (+97.2%).
I know someone is gonna disagree with this (I forget who), but can you make Mana Holy Day boost all elements, instead of none of them? Mana Holy Day is so... mundane.