It also happend with my Barbarian character.
the skill Bash with Punish runstone buff does not show or stack on my screen after i attacked.
well at least i don't see i on my screen which it should be placed above the skill bar, or anywhere on the screen. However the skill Frenzy showed and worked properly.
So please help. im trying to get some epic gear at Iferno Mod but with thoses problmes, i can not really enjoy all the fun.