We know that Against Voyagers is a Fun thing. You have more advantage if you have birds eye view. Try to tornado him when you see him. But if he tornado you first, tornado him once you drops. If you're unlucky and receive 1 conch ray, just sit while he is in the air and conch ray once he drops. You can also do a conch ray+lightning combo. Once your tornado recovers, use it and sit. Keep on doing that and most probably you will win.
Then for Against Champions, 95% you will win. You just keep conching and lightning combo. If you're going out of MP, tornado him and sit. That way, you are bound to win. And Against Crusaders, you will win 90% of the time if they are around your level(tales of pirates 2 gold). Just run up to the middle of the arena and sit. Most probably they will stun you while you are sitting. You will then have a advantage, cause their dmg is around 10-100. And at the same time, you are recovering life. Once the stun finishes, just conch+lightning combo him. Then conch him again and he is dead.
At last for Against Clerics, Never won a cleric before so im not sure about the tactic. But just lightning bolt him, tornado and run. Sit while you can. Once he runs towards you, bolt him again, tornado him and run. Repeat the attacks till they die. If you're bored, try using conch ray. Better hope you have max tornado on this one. Just have fun in TOP2.