Get rid of once per week restrictions on XP band recharge and lamian fang key.
The lamian fang key is particularly troublesome. I don't think you can get to most of those cells without two keys, but the ??? spot only gives one per week. I know you can farm them, but the drop rate is abysmal. Maybe up the drop rate and/or get rid of the once per week restriction?
Also, let's drop the "you can only recharge or buy 1 chariot/empress/emperor" band per week. It seems a little out of date considering all the changes that have been made to boost XP rate. I'm fine with keeping the 16 hour cooldown timer. Keep this, and actually the Empress Band is unaffected (it takes a week to blow through all 7 charges anyway), but it would help with the Empress Band.