Another good way of telling how strong a fleet is is to pay attention to any synergies they might have in their starting fleet (since you can't see their reinforcements). If they have Biggs but don't have any method of generating target locks outside of him or maybe one other ship, you'll be able to kill Biggs super easily. If they run a Republic fleet, you can expect some taunt swapping and should probably bring an extra dispel with you. If they have Sun Fac, consider not using Ackbar's heal or other methods of generating buffs until you can kill the 1 or 2 primary targets that would otherwise get to hide behind Sun Fac's taunt.
Conversely, you should make sure you have some forms of target lock if you're planning on running Biggs as your taunt - he's the weakest tank in ships, until you start recovering protection on almost every turn you take. Making sure your fleet has synergy is important.