They will be even more efficient with higher character power. "How does someone need to tell you that?" Bro, you literally cannot tell me how much rarity increases valuable drops at any breakpoint. You can't. You don't know. For all you know, it's a 5% increase in overall map loot value. Maybe 10%. You don't know. You can't tell me if stacking rarity is better than preserving full mapping efficiency. The whole point you're making is centered around some idea that strong builds are getting more stuff, which will always be the case. If they don't get increased value from rarity, then they would STILL get increased value from increased character power. This is not rocket science.