A magical weapon, help please

[Spo teh pro]

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_BLOCKARMOR, 1)
setCombatParam(combat, COMBAT_PARAM_BLOCKSHIELD, 1)
setCombatParam(combat, COMBAT_PARAM_EFFECT, CONST_ME_HOLYDAMAGE)
setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_HOLYDAMAGE)

local arr = {
{0, 0, 0, 0, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0},
{0, 0, 0, 1, 0, 0, 0},
{0, 0, 1, 3, 1, 0, 0},
{0, 0, 0, 1, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0},
{0, 0, 0, 0, 0, 0, 0}
}

local area = createCombatArea(arr)
setCombatArea(combat, area)

local condition = createConditionObject(CONDITION_PARALYZE)
setConditionParam(condition, CONDITION_PARAM_TICKS, 5000)
setConditionParam(condition, CONDITION_PARAM_SPEED, -500)
setCombatCondition(combat, condition)

function getCombatFormulas(cid, level, magicLevel)
	local formula_min = -(level * 0 + magicLevel * 0) * 0 -	500
	local formula_max = -(level * 0 + magicLevel * 0) * 0 - 1000
	return formula_min, formula_max
end

setCombatCallback(combat, CALLBACK_PARAM_LEVELMAGICVALUE, "getCombatFormulas")

function onUseWeapon(cid, var)
    doCombat(cid, combat, var)
end

Well, this is what i got yet..
It's a weapon that shots everytime a "holy area", tho I dont want that, I want it to be critical and also it should paralyze the target

Does anyone know how to add that to the script?
Would be very kind of you, thanks!