Soviet, you mix things up
Berger actually, says the mV rating is per pack - which is true.
So, increasing your peak detect will probably solve your problems.
I'm using 35 mV. 35 / 6 = 5,8, which is close to several matchers recommendations. LRP's manuals are always on the safe side, so dont listen too much to them
You might like to check out www.fukuyamaracing.com
or some of the other matchers.
Use a themmometer to check the cut off temp. At my experience going from 45 deg. C to 50-55, increases punch noticeably. But I dont like going much higher than 55, due to battery life
So the idea is to start with a rather low mV cut off. Check ct off temp, and eventually adjust mV cut off, untill you reach a reasonably cut off temp.
As batteries wears out over time, it's often needed to inscrese mV cut off sligthly. mV cut off, also depends on ambient temperature.
I cant remember if you got a equalizer board. But if you dont, I highly recommend getting one. It'll both increase battery life time, since it prevents cell reversal, AND improve performance.
Have a nice day, and happy racing