I already answered some of lion95's questions in a PM. But for me on a light-medium shot the Violet inside will work. Please refer to the BTM numbers on medium and light-medium BTM conditions. Also for me, I would not suggest the Green Blue Centaur inside....why it is an archy non-flaring ball that needs entry angle for better carry. Green/Blue is a great down the boards track area ball. Great for wet/dry....play the dry and the oil line.
Inside the Violet will work until you need to go to something stronger for carry down and inside carry angles. Violet is not a skid/flip ball like the G-3 or Greenie more even roll as it will pick up some mid lane.
I am different than a lot of players in that I go to stronger equipment as I move deeper. Most seem to go to weaker and stay on the same line. I go stronger and try to pick up some head oil for energy retention and better carry.
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Scott