So in regards to Lillith's roll. Her Dex is 1, her Firearms is -1, then she's using autofire. There are three modes of autofire, but I'm going to assume that by your description and what a gun noob would do, that she's basically holding down the trigger and just spraying, which would be a longburst +3 modifier; for a dice pool of 3d10 and not a chance roll. So Lillith actually gets at least a hit and I'm going to roll the last two dice
(2d10)[8][6](14) and why not 10 again? (2d10)[10][4](14)
There you have it. Lillith gets two hits.