Stun hammer, it stuns, so it's viable for PvPing.
some of those warrior builds are either REALLY outdated or just completely horrible. i wont go into details, but hammers? bears? the myrm health skill? no final skills? by the time your overlord it would generally make sense to have ending skills and less starting skills.
Bears. The kicking bear flinches and hurts if it crits. The I'm going Bear one still launches, so you can combo with it.
And the myrm health skill is personal. It adds 25% of HP at lv 5, but it's up to you. There's nothing wrong with it.
And did you consider that some on the ending skills might SUCK? The ultimate SUCKS and the second awakening Overlord skill sucks. The only good Overlord skills are Death Stinger, Death Grab and the movement speed one. Other than that, it's stupid.