When I'm DRK MT in Thordan Ex - Just as Shield Oath Holybladedance is coming up, I will use Dark Arts + Dark Dance + Foresight to save on my stronger CDs I will also use this combo for the first Heavenly Heel to save on CDs for later. For Sword Oath Holy Bladedance I will only use Shadow Wall if I have faith in my healers. Otherwise it will be both Shadow Wall + Shadowskin.
Overall, I will use Foresight combined with another skill that has a shorter CD timer.