Out of 54 data points, I've successfully brought down the veil 53 times. Only time it didn't work using V+A is:
You queue up a batch for Obscuring Veil containing Forge Orb and Brute Strike.
You reforge part of your system's Hardening into a glaring eye.
You dug around trying to penetrate the veil, but didn't end up with the necessary amounts of insight and force to bring it down.
The feedback chatters against your connection, dealing 1 damage to your system's hardening.
Subrelay WTR-273's automated defenses follow your tracks, increasing the Alert by 6.
Had 7 Code finesse here — only had a few other data points at 7 CF, most of it is in the 12-15 range. Could be a check if CF > 1d8 or something like that?