Barb + WolfHowl + Cresent Moon + Beast

[adeyke]

It is absolutely a bug. It's not only Marrowwalks that's affected. If you have an item with charges of a skill but no points in that skill, the slvl of the charges is considered your base slvl for purposes of synergy.

Again, this is a bug. If you specifically use Wolfhowl, Crescent Moon and Wolfhowl together to get the synergy, that's bug exploitation.