Vampire Count Extra Fighters

As Im coming to a finish with my VC army and paint., Im wondering what units to support with extra fighters. I currently have 10 Grave Gaurd, but thinking I need another 10. Is this nessesary?

Iv'e also just now noticed I can have up to 20 Blood Knights, is more then 5 overkill with a lord, or a possible 2nd unit of 5 BK's running each side of the table.

Any thoughts on the construction of my Vampire Counts, as I have a full army to work with, just wondering If I need more support units here.

Thanks

Ok I dont like blood knights but who knows, I am useing 30 grave gaurd in 2 units of 15(seems to work great for me) but I am also super magic heavy with packing everything I can to rebuild my units are stuff dies