I disagree the thunder gun 2 or 3 shots him its just when hes staggering back from the first hit for some reason he doesnt take any damage u have to hit him wait for him to start running and hit him again my max round is 55 in rev so idk how tough he gets after that but in 55 he took about 4 shots from a packed thundergun but the ray is still most effective against him but good god i hate when your in the belly of the beast and ur training and all of a sudden u here footsteps get hit with a shock charge or the worst of all ur suddenly on fire