I found a really good combo of cards

I found a really good combo of cards, Sabrina's Alakazam and Haunter. S.'s Alakazam's Mega Burn can wipe out many pokemon in one attack, but if it doesn't, you cant use it again, but I found a way to get around that.

First of all, have S.'s Alakazam as your active pokemon, and have S.'s Haunter on your bench. If the defending pokemon with 60 HP or less just wipe them out with Mega Burn. But if they have more than that, you endanger the Alakazam. So what you do is first make sure S.'s Alakazam has 3 Phychic energy on him. Then use his pokemon power, Psylink, and use S.'s Haunter's Nightmare, causing 20 damage and putting the defending pokemon to sleep. Your opponent has to wait till the end of his turn to wake it up, and even if he does, its your turn again, so just put him to sleep again. Keep doing this until he only has 60 HP remaining, and use S.'s Alakazam's Mega Burn to knock him out.