MarvinS - Lots of options there. Being an APA, I agree with Steve's advice to bitter with the Warrior. I like its smoother bitterness in APA (where I bitter AIPA with Columbus or Chinook for more assertive bitterness). The two blends you mentioned are both great. Can't go wrong with either. Cascade or Centennial could be blended seamlessly into either of those blends. I've made several pale ales with Cascade, Centennial, and Amarillo late - old school but really good. And Mosaic/Simcoe alone works really well, too. I don't think you'll go wrong whatever you do, but I'd personally leave the Apollo out here - it's assertive in bitterness and when used late (it can be good in IPA). Let us know how it comes out!