Thank you. Yes, it is an endgame fleet setup to go for Biggs + target lockers. FYI I will now finish Biggs xWing and JC 7* and will keep Ackbar for quite a while, until I have a lot of credits and gear for a Mace lead. It will take months. If you farm 2 shards of FOTP per day that's 5 months...
Totally agree with that zeta / Tarkin challenge. You can also wait with the Tarkin challenge until you would also be ready to do the zeta mat challenge so you could have both FOTP and Vader in theory (reinforcements are allowed).