@Red_Zeke I've only played against an agro skaven deck twice. Unfortunately I didn't glean much from them. In both cases my opening hand came up with inspiration strikes, which led to me being able to snipe Skritch in the opening turn of Turn 2 on each game with an inspired Sanson. Removing Skritch so early and scoring Victorious Duel put me so far ahead that I didn't feel like the rest of the game was too much of a struggle.
Inspired Sanson was a big threat for just about the entire warband though. A crit Star Falcon can down any of the 2 health skaven on its own, which would leave room for Trap or Shattering Terrain to be used in situation where I wanted to confirm kills or take down something with 3+ life.
@Malakree I'd never considered both Dauntless and Sigmar's Finest. I can definitely see the synergy with Army Of One.
Given that the deck you're running is hyper agro, are you running any sort of defensive ploys at all? Even something like Healing Potion or Warning Cry? I tried running a deck loaded up aggression ploys and a couple of movement ploys at first, but just about always lost a member of the warband by the end of Turn 1 to other agro warbands. I suppose this just plays into the Dauntless and Sigmar's Finest gameplan for you if it goes down that way?