The Dark Lord it's using magics in the PVP so for the scepter you need Critical Damage Increase +30.
For the set and shield you need Damage decrement increase+7 because the Lord it's already ignoring reflect because the horse, you just need defense.
Look,I would recommend to choose between SD ignore rate and Critical because I play with booth and SD ignore rate works for me quite well.For set of course Damage Decrement Rate 7% because the Dark Lord's Hp and Defense are not that great like BM's hp and SM's defense and he needs that yellow option to survive in PVP.Choose what works best for your style of play,everyone has a different style of play,pot rate,sets and etc .
If you have good internet connection put 2 items with sd on your set and 3 items with DD now if you are from the Philippines put all DD in your set and Ill say put sd decrement in your scepter.
In my Opinion you have Great Potrate Choose Septer+ Crt if low Potrate Choose PVP increase rate and in Set Choose all DRI and For Shield DRI also i Tried it so far so good its up to you the decision is your's Sir laths: