Decreasing buildings and training levels for non promoted teams, has been my personal option.

And mix Tankers with higher level teams in cup, too should be considered + face tankers vs tankers... this need some regulation with sense, without be a "srict" and straight punishment and less if affects others...
Let's remind that the league manipulators have a deepest impact than tankers in mostly of cases...

And yes, assos should reward only if theres promotion by the teams...