Batteries for the logo 600

What batteries do you recommend for the 600 sx logo, for 3D flight at 12S?

We use 12S 3500mAh 50C Optipower splitted to two 6S.

Warm regards,
Pascal

Thank you very much,

I bought the SLS Magnum 6s 3500. Another question, what value do you put the Vbar NEO in the section (Heli size) in the Main rotor menu. We talk about the Logo 600sx.

Another question, the (cyclic optimizer) and the (tail optiminer) are left activated?

Mikado recommends 50 for the Heli Size