That sounds like it should turn out good. I just threw together 4 gallons of apple juice and 1 gallon of blueberry juice. Hoping it turns out drinkable.
I did three batches (1 gal each) with the same yeast, side by side ferments: A - 100% apple juice; B - 75% Apple and 25% pear juice; and C - 75% pear and 25% Apple juice.
C had more pear flavor (obviously), but I thought B tasted the best. I think your ratio would be good...
I've done a fifty fifty split twice now that came out at 1.008 and I'll have to check my notes but I think I used ec1118. Very popular with friends and family... And me too
Not much - I think I used either D-47 or Cote de Blanc yeast (not home to check notes, but use both often for ciders), each of which gets pretty dry... Usually close to 1.000