Re: Advanced High School sax player on Ref 54, looking for jazz mouthpiece options.
Otto links are good mouthpieces, don't limit yourself to a 6 though. Try different facings until one works for you. Perhaps trying different reeds can help too, like Alexanders, or Vandoren ZZ's. As for altissimo, work on overtones, lots and lots of overtones. Then do long tones on the overtones, making sure they are in tune. When you can jump around from partial to partial in the same overtone, your tone, sound and range would have increased dramatically. Since you're a tenor player, I'd say check out some metal mouthpieces. Always play test and compare before you buy, it's your sound! Happy Hunting.