@Karu, the point is there is not enough people digging at the same place at the same time so kami blast is barely inexistant, I already raised this point 2 years ago (or a bit more than that).
@Ntilza , there is what you mentioned indeed but in this kind of adjustments the game needs to go deeper:
- decrease the amount of sup/xl available each season;
- decrease the amount of MPs dropped by bosses;
- the life of armor/weapon/tool;
- decrease the amount of MPs produced by OPs;
I also raised that from time to time for the past few years sadly :(