Two must haves for Nazgul decks are
The Angle and
Woody-End.
As far as Forest Sites go- actually, the hard-and-fast rule is 4 forests. Because at that point, you max out your
Dark Approach, and that's what the Nazgul run on anyways. I mean, if you're also running
Lost In The Woods, then the more forests, the better.
Ulaire Enquea, Duplicitous Lieutenant is better than
Minas Morgul Answers, in my opinion.
I would also pack at least 1
Ithil Stone and an
Ulaire Enquea, Black Threat. The point of Forestguls is to get as many of them out at a time.
I also prefer
Ulaire Cantea, Black Assassin for rule of 5 enforcement. If you drop a couple early-game Canteas to trim down their 9-comp monstrosity, then when you get your handful of Dark Approaches and slam them with a horde of cheap Nazzies at
The Angle, they're reeling pretty bad (which, of course, is made possible by an
Ithil Stone and an
Ulaire Otsea, Seventh of the Nine Riders.
The
Moving This Way engine is why I pair my forestguls with a FP filter deck. By around site 5-6, Cantea has struck once or twice and there's nothing in my deck but Nazgul. Muahahahaha.
As for the freeps, your
events are going to be getting in the way of what you want with your Nazgul. I would run
Aiglos and some
artifacts to start. The muster is good with Celeborn,
Kindreds Estranged is solid.
You may run an extra couple
Standing Tall and some toolkit Legolas.
Fearless Marksman comes to mind as useful in cycling. The combo is also nice- dump 4 cards, wound the minion you want, bam. -4 strength. The point is that you want conditions because they can be dropped immediately, and thus don't clog your hand.
Cirdan, The Shipwright may also be a nice combo with Celeborn. Muster +
Fearless Marksman + Celeborn's ability = tons of events hit your discard pile,
Cirdan drops tons of strength and Celeborn nabs back the
Final Shot to survive the double. I might run him over Glorfindel.