Which dark team composition?

With the tank options you have available I’m not entirely sure. Most people only use a tank that starts turn one with taunt already like shoretrooper or sith trooper. The problem with tanks that don’t start with taunt on an empire team is that by the time you get taunt off, it’s already too late or your opponent dispels the taunt and now you’ve got a useless character. Now if you don’t mind shelling out some crystals to get shoretrooper to four or five stars, it can be really good as long as you gear and mod it well. Generally speaking star level doesn’t matter as much on tanks. Shoretrooper and sith trooper are ideal since they start turn one with taunt and force your opponent to deal with it while you get the empire tm train rolling. Shoretrooper is far superior though unless you’re using like a sion/Nihilus team.