For the fallen half, I used Vex Mythoclast. 2 reasons, a) it is new to me, b) probably the best counter to the solar shanks. Second half I switch to Oversoul Edict. Not a better weapon for taking out shielded knights in arc burn. Always had my arc Efrideet's Spear as a special. Just demolishes in arc burn. One hit yellow enemy kills with headshots. Heavy didn't matter as I barely used it.