I have a very different opinion. Being the least powered fleet on my shard in the top 10. There are guys with 15-20k more power in the top 5. Against these guys applying target lock is sometimes crucial but only because they have stronger fleets. It can sometimes still be turned around even when target lock fails by having my reserves set up for plan b.
Hint unless your really fortunate to have vader as strong or stronger than the most part of your crew have him as 1st reserve. And have an assist caller as your alternate 1st reserve. As no good calling vader in when biggs is low on health.