I'd rather play Shock instead of Arc Trail as it's an instant and costs only one mana.

I have mentioned Pillar of Flame previously as you can get rid of annoying undying creatures.

If i get time i shall playtest with some Shocks in :) cheers

I made a vampire deck to help you a bit. I know you wont be able to afford most of the cards in this deck but its a good shell to work towards. http://tappedout.net/mtg-decks/vampires-stardard/

If you need me to explain any cards, let me know.

The Infiltration Lens is a realy good idea, i had been looking for car draw, i shall definitley try to give that one a go!

I'm having trouble trying to find places for Shock,Infiltration Lens and Blood Artist any ideas?

hmm... I'd do it like this -2 Tragic Slip +2 Black Sun's Zenith

side > -4 Bloodcrazed Neonate +4 Shock

you may also think about siding classic Surgical Extraction and/or Ratchet Bomb & Nihil Spellbomb

Looking to put at least 2 nighthawks when m13 outwhat to replace?

lol 2? try 4..... Markov Patrician is worse than Vampire Nighthawk without flying ... take them our and some Markov Blademaster , they make the manabase shanky and die to Gut Shot which is really really bad.

i did say at least 2 as that how many i have already (woo for zendikar ones XD)Markov Blademaster can become Vampire Nocturnus If i get lucky :P