Jax is very Susceptible to magic damage. His high dodge is what makes him near-invincible against melee. IMO, the extra magic resist is more beneficial then the 5% damage.

In my expierence, having less kills AND less deaths is better than having 1-3 more kills with 4-5 more deaths.

dis is not a orignal jax build nice creativity. althouhgh, i think u can change your maesteires to 21/9/0 works a lot better like y take magic resistance inseatad of havoc?
the combo of mardereds razor, frozen mallet and black cleaver works but ill try dis build first to see how good it works