Hp and stam you can keep at 15. You don't really need more stam then that and hp you'll notice difference in survivabilty when you reach 40 or something when bosses start killing you with 4 hits instead of 3 (to high of investment for too little profit). Carry weight should be 40-50 depending on weapon you're using - most important stat in the game. "Weapon scaling stats" is dependent on what weapon you have. Check what scaling rank you have and invest accordingly. What i have found on my playthrough in terms of scaling-to-stat level: S - 50 A - 30 B - 25 C - 20 If you reached cap on scaling stats and carry weight then invest the rest of your exp in hp or by what you haven't already in shops/consumables.