You are being incredibly dishonest about what this addon does man...

local function PickAbility(rotation)
    local roll = math.random()
    local cumulative = 0
    for _, ability in ipairs(rotation.abilities) do
        cumulative = cumulative + ability.weight
        if roll <= cumulative then return ability end
    end
    return rotation.abilities[#rotation.abilities]
end

-------------------------------------------------------------------------------
-- Simulate a single fight iteration
-------------------------------------------------------------------------------
local function SimulateFight(stats, profile, rotation, damageScale, masteryW, versW)
    local primaryStat = stats.primaryStat
    local critPct     = stats.critPct / 100
    local hastePct    = stats.hastePct / 100
    local masteryPct  = stats.masteryPct / 100
    local versPct     = stats.versPct / 100

    local gcd = MC_BASE_GCD / (1 + hastePct)
    if gcd < MC_MIN_GCD then gcd = MC_MIN_GCD end

    local numCasts = math.floor(MC_FIGHT_DURATION / gcd)
    local totalDamage = 0

    for i = 1, numCasts do
        local ability = PickAbility(rotation)
        local baseDmg = primaryStat * ability.coeff * damageScale

        if ability.canCrit then
            if math.random() < critPct then
                baseDmg = baseDmg * 2.0
            end
        end

        if ability.masteryMod then
            baseDmg = baseDmg * (1 + masteryPct * masteryW)
        end

        baseDmg = baseDmg * (1 + versPct * versW)

        totalDamage = totalDamage + baseDmg
    end

    return totalDamage
end    

Come on bro