I do not know what's going on Combat range Max melee range Max range range He hits 3 monster and stops ... how can you ask him to stay Perma Flicker?
I am going to assume that you are just running out of charges. Try with a better source of frenzy generation. Blood rage is probably not enough. Look at terminus est, poachars mark, blood dance etc. check the bot and see if you have consistantly frenzy charges.