for those who may need this, YES, THIS CAN BE!
Take a look for the example:
doCombatAreaHealth(cid, COMBAT_FIREDAMAGE, getCreatureLookPosition(cid), area, -1, -300, CONST_ME_HITBYFIRE)
in param "POS" add the function "getCreatureLookPosition(cid)" to make this a directional spell :)