Yeah we figured those scenarios were there to soft up the wraiths before getting them into the other scenarios. Especially the one with gandalf at amon sul.... that one is just murder to gandalf... 9 sap will attempts a turn leaves gandalf a very poor spellcaster extremely soon. In that case the best tactic for the dunedain is just to try to get all the wraiths will down to 0 to see if the evil player botches a good number of recovery rolls. But when just playing the scenario it feels kinda wierd that the wraiths pretty easily get shot down by an arrow.
Sentries is a nice idea. We are toying with the idea to give the wraiths the elven cloak rules instead representing that the riders travel mostly at night. To "balance" it we could remove the nazgul cry rule.
I agree that balance is something that should be disregarded in these scenarios. Heck it wouldnt be fun if it were balanced. But there are some scenarios which is outright almost impossible. Especially in the first book. The first two spring to mind immidietly as well as the one with gandalf at amon sul. But also the one in which frodo and aragorn face lurtz the first time. The ringbearer pretty much always pop the ring when the uruks get into range and then run down the table while aragorn just have to survive a few turns. That one pretty much just come down to frodo's dice rolls to see who controls him.
I was just looking around if anyone has any good tips for the wraith player as it seems like we are horrible playing a ringwraith only force against 9 mini-heroes. Not to mention that keeping track of the dunedains M/W/F is pretty darn tedious.