I used her with my bugs long time until I got the Alpha. She worked quite properly as a healer and damage booster for the geos. In GAC she was useful with her revive ability in connection with getting - or not loosing - banners.
Currently I use her in Sith Raid with this lineup: Nute lead, GG, Dooku, Jango and Visas. Her permanent counter attack with healing is very useful. Dooku takes down the seps in stealh and therefore Nihil has to attack only Visas who counters and heals all the time while the others do their nasty things... The average damage for this team is 4M. And it is funny. :)