Powerful and Precision Hookset does not increase the gathering rate of the fish instead it just removes the ineffective hooking status which in turn gives you a higher probability of catching a high-quality fish. Some fishes have a high escape rate so even if precision/powerful hookset is used they may still get away. As for Patience 2, i'll try catching illuminati perch later and see if there is a difference in value between patience 1 and 2. If Patience 2 gets a high collectible value then i guess Patience 2 just increase the likely hood of catching a larger sized fish.