FAQ says only unmodified 1s auto miss.
Be careful though, the drug gives you 1+ WS not +1 to hit.
This means you hit on a modified 1.
2 - 1 = 1 with a 1+ WS it is a hit.
You are not canceling the -1 to hit from the glaive by adding a 1 back to the hit roll. Have to wait for turn 3 power from pain for this.
2 - 1 + 1 = 2
Bear me thither so that my blade might taste of their flesh.