To fix the 2 boss grind just need to put myth on the last boss alongside the soldiery. You can't really stop ppl from griinding the same content if it's the most efficient way, but u can at least put it to where everyone running the same dungeon at least has completion in mind, instead of situations where ppl farm 1st rooms or 1st bosses, put it to where the xp or currency is accrued but not actually obtained until completed.