Maybe set it up so if you are involved in a pk fight the following happens.

If one of the people involved in the fight is level 25+ then both people get the benefit of 25+ bash/trip. It just seems a bit biased, when you consider who benefits from bash the most (giants) have primarily 25+ opponents in their ranges. It would be only fair to make it so if the opponents can bash/trip fully, so should the under-ranked. Otherwise, not only does the opponent have a possible 9-rank advantage, but the under-25 player is horribly hindered in comparison.

Just a thought