With a +5 swinger, 4 mil cub a 22-9 paddle might be too much bite at the line. I hate ending up on my back. But none the less I would go with 22-10 paddle on an +8 swinger minimum, +10 depending on the power its putting out. This is only because hill shooting/drag racing is first priority.
I think you made the right choice since carving the bowls is what you want. You will still be able to hill shoot. You should be able to run lots of motors down with that +4 mil cub.