How to make Ogryn better at havoc?

So at the moment ogryn has to play backline untill most of shooters are gone, then he can engage whats left in a very un ogryn like fashion. Up untill havoc, ogryns toughness regen was good enough to carry him through auric games with normal amount of situational awareness, now in havoc 20+ if numbers of shooters are left uncheck he melts realy fast. From my limited testing it seems his biggest weeknes aside of mediocre mobility is that his big statu make him a good target even during hords while others can "hide" in chaff. What can be changed about his kit/talents to make him better in havoc? More % based skills? Signature skills rework? Just getting gooder? Or is my expirience somehow unique?