Thing is you NEED the null ROD in this deck. I can't see another way to compete. And I think Curse is the natural pick next to null rod in T1. I worked with Oath of Ghouls in the past and when I saw curse I knew there was serious potential.
I am starting to believe that without full acceleration (you could go with full but then you have to accept the dys synergy with ROD and I rather dont want to do that personally) dark rituals are an interesting alternative.
You do not want to drop confidants in a black based creature deck. That is a very bad call. I took the idea into consideration but I never promoted it. So back to reality.
You want Confidants, curses, macabres, streets AND a clock. Is this possible? I am wondering with the non counter-able grave hate you could go less control. Y Will becomes dead in their hand. All kinds of bazaar ideas are all hard to pull of with Oat/Macabre. Intuition with regrowth effects, gifts and the likes become almost useless. The macabre looks innocent on paper but in fact he does much more. He stops welders, strip locks, tarms, grunts,...
I strongly believe that Curse/Macabre/Confdiant is the way to go. What you do from there is your own imagination and creativity. I picked Null Rod because he is extremely strong right now. I also added wastelands/strip to give more mana denial. What you can also do is add more acceleration and draw. TFK doesn't sound bad with Oath and more acceleration. Also intuition ideas sound interesting with Oath. But if I go for Cursecatcher I stay consequent and build in more mana denial to make curse stronger in the long run. I am sure there are other routes.
4 Oath of Ghouls
4 Dark Confidant
4 Faerie Macabre
4 Cursecatcher
The problem with streets? You want to run Force of Will, at least try it. And with 4x Force and 4x Streets you will reveal them with confidant and lose 5 life. Add in the streets -2 life and you will have a problem. Perhaps 2x streets is OK (if you really want him) because he will be nice if you see him but you do not need multiples. Also don't forget macabre is also 3cc. These things add up. Caution is advised.
Is it possible to combine confidants with streets without dying? I am sure it is but you will need a big clock to do it and that is why I suggest to play dreads and tutors.
EDIT*
The problem with streets? You want to run Force of Will, at least try it.
You could try 4x Daze instead of Force of Will