For Pentastar in the 2.1 with Balance and Flavor, I do 1 Praetor, 2 ISDs, 1 Venator, 3 Acclamators (2 replaced by VSDs when I can access them), 3 Enforcers, 2 IECs, and 3 IPVs. I find that this fleet composition is very well-rounded and can hold off most attacks by the Remnant and NR.