I honestly cannot see how anyone can climb to top 20 with CLS. I've been in on that trying for a year now. OP, G12 C3PO is fine. At this point you should know as well as I that defeating an all R7 DR Malak team with 325 or better speed simply comes down to:
- did you kill BSF before her turn? You did, 85% chance of victory. Fail = lost battle.
Here's my team if a fellow CLS arena go-er has some tips for me:
https://swgoh.gg/squads/149391/
I guess upping my 3PO to get extra speed would be an extra opportunity to kill BSF. At 156K GP in a CLS team though, geez what a mechanic discrepancy. I'm thankful it can kill GAS teams easily.
I hang top 50 to 150 with no crystal refreshes OP. I recommend g13ing C3PO for LSTB. Because you probably will want to throw him with Padme. Consider zST Han for your CLS team when you do that. Old Ben is more nostalgic for the team in my opinion but I do think ST Han is the better tank. P Leia is another good option because forget tanking. CLS with guard should be your tank. Nice to have another canon on the team.