I think you're missing the point of the 5/3 split
For most people 4/4 and 8/8 are the only deck splits they will use, a few might use 7/1 but thats a bit uncommon, Theres nothing bad about the 4/4 split but a problem with 4/4 split is that you end up with 3/1 hands quite often and one card is without their bonus. While this is solved with going mono not every clan has the cards to make mono efficient. This is where the 5/3 split comes in, some clans are more dependent on their bonus than others. For example drawing a 3/1 and having a freakz card without bonus is pretty bad, on the other hand drawing a 3/1 with a
Skeelz not having a bonus and its not as big of an issue. Going 5/3 helps eliminate some of the rng of drawing your hand. By going 5 cards of a clan that is very reliant on their bonus, like freakz and
Uppers, and going 3 cards of a clan who can live without their bonus, like
Skeelz and
Pussycats, you can tweak the numbers in your favor. This doesnt mean that 5/3 is the better split, the 4/4 split is better for most clans but the 5/3 does have a purpose and it does its job. As for the deck kitsune posted i would say the 5/3 split is better because both
Zhu Tang and
Shifou are very reliant on their bonus to do their job.
Zhu Tang without his bonus is a mediocre 3 star, same could be said for
Shifou. Anyways didnt intend this to be a wall of text so ill stop now