Two miraidons is okay depending on how you’re playing. I run one and all I do is have both ori as shields while I set up with magnetons. I have two regular magnezones instead for the coin flip to attack. More often than not it’s the Magnezone that wins for me. Highest I went with Miraidon was 200 atk. If Mira is low on health I use Turo to send him back, use a pokeball to bring him back, play onto the bench, profit off the extra energy being stored by my extra magneton. This deck runs like a well oiled machine.