Goddess Scorned Crit Ele Cleave with HoA prolif (1.3)

What about getting Aplahs Howl and run additionally Herald of Thunder? paired with Doedres Damning for dual curse assassins mark+wardlords mark (mana and life leech)
you could replace life leech gem with multistrike (lower burns but it wouldnt feel that slow), inc crit damage or added lightning or faster attacks