The Blackguard's AWs don't inspire awesomeness to me, and again the daily issue. Otherwise, again awesome.
One thing I found when looking at it, is that while it doesn't seem impressive at first glance, the Blackguard can have a lot of stuff stack up and get up decently high.
Somewhat against expectation, because it gets so much damage from having CA, you're actually going to get good mileage out of a rapier, since you can use Light Blade Expertise. It feels very odd to have someone in heavy armor and shield use such a small weapon, but you really don't get much use out of the more macho axes and hammers.
A somewhat unexpected "bonus" is that you really dont have that many feats to work with for offense, so you can spend a lot more on defense...which is good, because the combat style encourages you to fling yourself into mobs of foes.
[sblock=Showing My Math]
Let's see...this is a 15th-level blackguard using Vengeance Strike with a +3 Radiant Rapier on a bloodied target with four or more adjacent opponents, Str of 22, Cha of 20:
Str +6
Enh +3 enhancement
Weapon Focus +2 feat
Light Blade Expertise +2 untyped due to CA
Radiant Weapon +3 item
Vengeance Strike (+2x opponents) +8 power
Dark Menace +5 due to CA
Spirit of Vice (Fury) +2 due to CA (+4 if also bloodied)
Gauntlets of Blood +2 untyped due to bloodied
Blood Thirst +2 untyped due to bloodied
So that's d8+37. Which is pretty good for a mid-paragon at-will, I think.
Even with Ferocious Strike, with CA and bloodied target that's d8+29. With a target with CA only (which you will want to invest in obtaining as often as you can) that's d8+23.
[/sblock]
I'm going to hopefully get to try this out in a while once we switch from Dark Sun to Forgotten Realms or w/e, unless I change my mind and find something else I want to play.
Brad