Beating First Order

Need a foolproof way to beat FO consistently in arena

I run zEP(L), Vader, Thrawn, Tarkin and zHan (last 2 soon to be subbed out for Sion and Nihilus)

sometimes coming up against KRU(L), Kylo, FOE, FOO, FOST/FOTP

what's the best way to beat this team??

Thanks