That pup would never sell as a trainable pet so all you are really buying here is a bank sitting pup. Good luck on the 8P asking price, I have seen these go for a lot less.
4 slot cus are bank sitters. you can use a trained 3 slot for sure.
Sure, higher intensity would end up with more hp. If you want to get real precise, the difference between this 34% and a 66% cu is 70 HP
People get caught up with intensity because they want to maximize what they are getting, but the range from top to bottom is not nearly as vast as people think.
If your stance is that a 605hp cu is un-usable, but a 675hp cu is great then I guess we don't see eye to eye.
And as for selling price, I have offers of 7p already so I am not worried.
This is how I would train it: