In regards to the skills, look at the necromancer skill spectral binding and spectral wrath (so good for physical) also max out warcry for the damage reduction. remove fighting spirit for now if you have to cause its not that crucial, remove veterancy or keep 1 point in it. You dont need 9 points in menhirs will. If this skill triggers often than something else is wrong.
i would do something like this https://www.grimtools.com/calc/4ZDQOLQN
but this might change your playstyle a little because spectral wrath only has a 4 meter range so you have to be in their faces all the time for the physical resistance reduction to take effect.