Darach fought off a skilled Inquisitor/Malgus who has greater inherent potential than either so he should wipe the floor with Sion who has only beaten mooks. Katarn probably dies to Maul with difficulty on Maul's part, given Maul as already beaten two of the Jedi's most skilled Swordsmen, fought off scores of Black sun fodder, and is the most skilled Sith apprentice in history. Not sure what Ekkage is contributing here, Hoth probably kills her. Mara Jade is more powerful than Drallig but probably not as skilled (At this time), but honestly Maul should clinch it for his team.
@KJ - A Dark Councillor from the TOR era who was apparently one of their deadliest Sith assassins (or was it the deadliest?) Somebody else might be better equipped to expand on that.
Mara Jade's trained in assassination protocols and undergoes some pretty good practice IIRC, but I don't think she's really beaten anybody of particular note. Just putting her in as a counterbalance to a team that I think is primarily better than team one.