Not Updated For Current Season
i have tried this build for Sion for some games and it seems to work for me.
i use cryptic gaze's stun as first skill,for safety reasons and hunting/fighting.
early enrage in lvl2, is for survivability reasons(it's like wearing a warmog's armor)and of course dmg,which helps farming.
after i just lvl with death's caress,which offers me lots of dps,even i need it to kill or farm.
cryptic gaze+death's caress+some hits,when required +ulty,is a very simple way to kill and thats what i like on Sion.