Would IMC consider boosting some c3 skill such as cleric c3 or krivis c3?
As class rank higher, we have the more better choices for class.
Going C3 should have some value that can complete with the new class choices, we should have a unique (and real useful) skill not just the upgrade of c2, for example the QS from archer class to make going C3 worth it or you can add more exclusive attribute for C3 other than some useless skill.
