Lvl 74 Vegeta - Lvl 75 Goku - Lvl 76 Gohan Personally I finished the story at level 70. In order to reach this area and complete all of the Villainous Parties, you must have completed the story and I expect are around level 70-75. Afterwards, Mira will appear in 'Land of the Kais' in the 'Off-Earth Area'. In order to fight Mira you must first complete all of the Villainous Parties. However, I would recommend a decent amount of healing items, depending on how confident you are at dodging attacks. It personally took me less than two minutes to beat him, and I used a single Senzu Bean (no other items). Dodging to the side of his Dark Kamekameha will give you plenty of time to charge Ki for more attacks. Repeatedly dodging to the side will allow you to avoid most of Mira's attacks. The biggest thing is just paying attention to the boss's attacks.

Z-combos and Gohan's Super Kamekameha can give you breathing room if you need it. Start the fight, immediately turn SSJ2, spam the hell out of Spirit Bomb (from support) and Big Bang Attack. For food, I just had the Deluxe Meat Meal, my cooking was only level 4, and Z-warriors were level 7, so those aren't particularly important aspects. Make sure you have the highest forms of Big Bang Attack and Spirit Bomb available. I had Vegeta (80), with Goku (79) and Gohan (85) as support. Honestly, you can cheese the whole thing with Vegeta/Goku.

Figure realm dragon ball z