GWF top Weap chantments? Enlighten me..

Lightning, HA, apprently Terror now, Vorpal? Vorpal being for the lower power GWF's id imagine. Once hit the base higher power, which would be best overall, or are they situational? Lightning is GodMode for trash i know, well i hear as i dont have one, but how about bosses etc? Also for M12 what are yall using?