Well Luke is easier to get (at least in terms of farming the required characters). There is also a lot more flexibility in Empire/Rebel squads as opposed to Resistance/First Order squads.
CLS is easier to get and will help you through herpic Rancor raids and AAT raids easier. He will help you to better rewards while farming for JTR later. On top if that he also has a place in the STR raid.
Not to mention you can at least use most of the CLS toons. BB8 is great, as are Finn and Scav Rey. But apparently the vets are just awful.
As opposed to STHan, Leia, Old Ben, R2 who are all solid. And Farmboy who seems situational.
CLS is good in arenas, in collecting shards on hard maps, cantina maps and in Pit and AAT Raids.
First you have to unlock R2-D2 on 7-star to receive CLS 7-star. To unlock R2-D2 you could need Palp. They way to unlock JTR is difficult because you need Veteran Smuggler Han & Chewie who are dropping in Cantina 8-F and 8-G.
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I don't really care about the sith raid. I mainly want to get through hard battles and do better in arena
I didn't even think about that.
Rey should be the long term depending on if you are FTP or P2P.
Vet Han and Chewie are tough to get.
CLS is easier to get and will help you through herpic Rancor raids and AAT raids easier. He will help you to better rewards while farming for JTR later. On top if that he also has a place in the STR raid.
I'm FTP
As opposed to STHan, Leia, Old Ben, R2 who are all solid. And Farmboy who seems situational.
First you have to unlock R2-D2 on 7-star to receive CLS 7-star. To unlock R2-D2 you could need Palp. They way to unlock JTR is difficult because you need Veteran Smuggler Han & Chewie who are dropping in Cantina 8-F and 8-G.