[quote=@LeeRoy]
[@ImportantNobody]
Hue hue, more like shit tier waifu. 

Your waifu choices are inferior to mine.
[/quote]

Waifu's power levels should be high, but not high enough to be mary sue unless it's a comedy like One Punch Man (not that the protagonist is a waifu...well, one of the side characters could be and she's pretty powerful too). If my far superior to your waifu waifu was more mid range power I could probably get more use out of her, though. Not that I'd need a waifu character to be my main fighter. She'll just need to be there to prove how she's the best waifu and you'll change your waifu to her.

How high are you thinking? Planet busting?