Need help with a spell

[Strikers]

I have this healing spell (Just like exura sio from druids but it heals over time)

local combat = createCombatObject()

setCombatParam(combat, COMBAT_PARAM_TYPE, COMBAT_HEALING)
setCombatParam(combat, COMBAT_PARAM_EFFECT, 12)
setCombatParam(combat, COMBAT_PARAM_AGGRESSIVE, false)
setCombatParam(combat, COMBAT_PARAM_DISPEL, CONDITION_PARALYZE)
setCombatFormula(combat, COMBAT_FORMULA_LEVELMAGIC, 0.2, 0, 0.2, 0)

local exhaust = createConditionObject(CONDITION_EXHAUST)
setConditionParam(exhaust, CONDITION_PARAM_SUBID, 1)
setConditionParam(exhaust, CONDITION_PARAM_TICKS, 30000)
setCombatCondition(combat, exhaust)

local function onCastSpell1(parameters)
    doCombat(parameters.cid, combat, parameters.var)
end

function onCastSpell(cid, var)
local parameters = { cid = cid, var = var}
addEvent(onCastSpell1, 0, parameters)
addEvent(onCastSpell1, 1000, parameters)
addEvent(onCastSpell1, 2000, parameters)
addEvent(onCastSpell1, 3000, parameters)
addEvent(onCastSpell1, 4000, parameters)
addEvent(onCastSpell1, 5000, parameters)
addEvent(onCastSpell1, 6000, parameters)
addEvent(onCastSpell1, 7000, parameters)
addEvent(onCastSpell1, 8000, parameters)
addEvent(onCastSpell1, 9000, parameters)
addEvent(onCastSpell1, 10000, parameters)
addEvent(onCastSpell1, 11000, parameters)
addEvent(onCastSpell1, 12000, parameters)
addEvent(onCastSpell1, 13000, parameters)
addEvent(onCastSpell1, 14000, parameters)
addEvent(onCastSpell1, 15000, parameters)
addEvent(onCastSpell1, 16000, parameters)
addEvent(onCastSpell1, 17000, parameters)
addEvent(onCastSpell1, 18000, parameters)
addEvent(onCastSpell1, 19000, parameters)
addEvent(onCastSpell1, 20000, parameters)
addEvent(onCastSpell1, 21000, parameters)
addEvent(onCastSpell1, 22000, parameters)
addEvent(onCastSpell1, 23000, parameters)
addEvent(onCastSpell1, 24000, parameters)
addEvent(onCastSpell1, 25000, parameters)
addEvent(onCastSpell1, 26000, parameters)
addEvent(onCastSpell1, 27000, parameters)
addEvent(onCastSpell1, 28000, parameters)
addEvent(onCastSpell1, 29000, parameters)
addEvent(onCastSpell1, 30000, parameters)
return TRUE
end

The exhaustion for this spell is set to 30 seconds, and when the player casts this spell he is exhausted for 30 seconds.

How can I make him only exhausted at this spell, and still be able to cast other spells?

Also, how can I make this spell be casted with secure mode off when using "exura regen "NAME OF PLAYER""?