your code was too messy, so i came up with this.
local combat = Combat()
combat:setParameter(COMBAT_PARAM_TYPE, COMBAT_DEATHDAMAGE)
combat:setParameter(COMBAT_PARAM_EFFECT, CONST_ME_MORTAREA)
combat:setParameter(COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_SUDDENDEATH)
local combat2 = Combat()...