Wow they sound like a handful. I think you should give them new homes or if their spayed and neutered encourage them to play outside to wear their claws out more, give them more stimulation and tire them out. That's if you have a fence. I don't know what the laws are like in your country. I hate scratchy cats too. I'm actually a dog person. Don't declaw them. Imagine someone amputating their kids fingertips because they keep biting their nails or some other incorrect behavior. They sound like they'd make good barn/farm cats. They have the energy for it. See if someones interested.