I rolled a 6, hijacked that room 278 you set up at
https://dicelog.com/logdice
I made a determined telegraphic attack (figure they aren't going to try dodging or hitting me) for +8 to avoid failure (just realize this would be base 20 not 18 as I input) reduced to 18 (not 16) but since telegraphic doesn't increase chance of crit success, it's 14 for that purpose so 6 shouldn't be a crit.
I'm not sure if we're using control points, if so thrust d6-4 resulted in a rolled 1, meaning -3, so I guess I don't get any and can't actually create any DX/ST penalties.