Next zeta

Main team is Rebels - Wedge (L) G11, Biggs G11 (almost 12), zCLS G12 (IBAT), OB G12, and zR2 (NC). Don't have Raid Han, OT Chewie, or any other noteworthy rebels to replace anyone with and was wondering -- should my next zeta be R2's Combat Analysis for cleansing in Arena, OB's Devoted Protector for dealing with dispels from Bastila, Ezra, and Thrawn's Fracture, or CLS' leadership and switch to that?