function(trigger)
    local MS_cooldownEndSoon = trigger[1]; -- less than 1.5s cooldown left on MS
    local CS_onCooldown = trigger[2]; -- less than 3s cooldown left on CS
    local targetHealthAbove20 = trigger[3]; -- target health is above 20%

    local execPrecisionStacks = select(4, UnitDebuff("target", "Точность палача"));
    if(execPrecisionStacks == nil) then execPrecisionStacks = 0 end;

    local shatteredDefenses = select(4, UnitBuff("player", "Брешь в защите")) ~= nil;

    local ayalasExecuteBuff = select(4, UnitBuff("player", "Каменное сердце")) ~= nil;

    -- if ms is on cd, don't check anything
    if(not MS_cooldownEndSoon) then return false; end;

    -- not an execute phase
    if(targetHealthAbove20) then
        -- ring proc and CS is available - we don't MS
        if (ayalasExecuteBuff and (not CS_onCooldown or shatteredDefenses)) then return false; end;
        -- CS is available soon - we don't MS
        if (not CS_onCooldown) then return false; end;
        -- target has exec precision stacks and no SD - we don't MS
        if (execPrecisionStacks > 0 and not shatteredDefenses) then return false; end;
    else
        -- exec phase, no precision stacks
        if (execPrecisionStacks < 2) then return false; end;
        -- exec phase, 2 precision stacks but no SD yet
        if (execPrecisionStacks==2 and not shatteredDefenses) then return false; end;
    end
    return true;
end