Im not sure if this thread has been posted but my internet just went our and comcrapst said it won't be up til 7 so im using my phone to post this. If you say it does work, how do you know for sure, ive read both that it does affect daggers and doesn't. Please help me before I waste a skill point or 3. Thanks

Nope, I would like to see a special combat based dagger perk tho, like puncturing damage bonus something, not the stealth dagger perk, though dualwielding daggers works wiith the dualwielding perks I guess

Stealth and all 5 ranks of the first perk will make daggers OHKO pretty much anything. (so the bladesman perk isn't needed, even if it would affect daggers). I only have 45 one-handed and 2 of the damage increasing perks + of course the x15 damage from sneak, and I hit for 720 when sneaking.

How do you see how much you hit for?

How do you know you hit for 720? Is there a combat log that you can activate?

UESP says it does: http://www.uesp.net/wiki/Skyrim:Sword#Daggers

See the little note below "Daggers"

Yeah but click on one handed on that page and scroll to the bottom and look at the notes.

Still unclear

24 x 30 is 720.

Of course armors effect isn't included, but the base is 720.