I'm am proposing a review of spells against monsters
A few bosses such as iris and MML are basically impossible to weapon break. With 43 INT I have a 2% success rate where as kv and cougar sit around the 25% mark..
Also fog of sleeping has a -% chance on alot of monsters most specifically on 81f+
Weakness, disease also really low chance on bosses like MML iris and justices
Maybe consider making a LVL based success rate instead of MR?