You can only charge at what your battery manufacturer allows.. Not what the charger can charge at.. Otherwise, you may need a good homeowners policy and a quick escape from the house.. LOL
I run 2 5 cells as I only have the astro 109 chargers.. If I had the 1010, I would run them configured as a 10 cell.. Not for any reason but the 1010 can do it and it saves a few grams in the plane..
I can only charge at 1c regardless as that's all my 5350's allow..
Chris