I just finished a MDN with him, and he's rather nice and a lot less complicated to use than I thought. The main thing he does is support first and then do damage. Because boy does he help Mao Faust become even stronger, and that's good. He's the master and he's having his servant go out and do his bidding. His skills aren't bad, his S2 is practically a S3, and good lord does Rusted Coin turn him into a monster. That gift combined with Hong and Maost slotted first and second makes the both of them run wild on the field with just doing anything they want.
I must say, when we get more Heishou IDs, Lord Lu will become even stronger.