Network is stable but pools may have issues after flushing and reset. I suggest to lower the min payout and max payout to 1XCI - 10XCI and to lower the payout time to 3-10min.
As per your suggestion I set min/max payouts and time.
There was an idea how to avoid "nicehash" attack till the software bug caused the chain split is found and fixed: setting difficulty limit or/and filtering. I would do it as well. But it's clear that it only works if all perform same actions.