Ok, so first of all if you want to find what Tabby's condition monitor currently is at and what her body attribute is, just do a Logic+Firstaid test, each hit giving you each piece of information and medkits can be used too. Use the same conditions (indoors -1). If you cut into Tabby, it's an automatic 7P damage she needs to resist. If you have leadership or use Influence power, you can get her to use her edge in her resistance test, otherwise she won't use it. You can reduce the damage of the cut with hits on an assensing test because you can see where the implant roughly is. You can also reduce it with hits on an anatomy and medical related knowledge skill test, but i don't see anything in either of your knowledge skills which would apply. You can default though to Logic-1. Assensing can't be teamwork, but this roll can be teamwork where you take the highest DP and then the person with the smaller DP rolls and the hits just add to the larger dice pool. If you're gonna do the cut, then also roll initiative because if she starts bleeding to death we need to keep track of order of combat turns. She's also gonna need to roll an edge (1) test to see if she suffers heavy damage and starts bleeding right away even if she doesn't overflow.
Spirits can help in teamwork with a service used up for each roll they assist with. If they don't have the skill they will default.