imo the best solution is to set chars to lvl 1, wipe the items, and refresh the family coins in the master accounts, like this everyone is able to experience a fair start (since there was kamaloka exploits) and you don't lose a single cent from donations. i must say im disappointed with your decision.
Second and important thing, the promo codes you have on eglobal events like wk or telegram are not working on DEX based accounts, be sure for the future to make codes that work on both sites!!!