LK 25 man hc Warlock question

[Agyness]

Hello paragon warlocks i want to ask you a question for the LK 25 man hc fight you see i checked a lot of videos but i still cant understand what way shall a warlock dps the valkyiers shall he use corruption in all of them and just seed of corruption the lich king or shall he just tab a lot and seed of coruption everything ? i hope you can help me out tnx you for your time