When making a boxer it is best to go for the best accuracy while retaining a good Defense and high Hitpoints is always essential. Usual boxer builds consist of stats such as 90 Attack 70 Strength 90 Defense 90+ HP. You can obviously change those numbers up but as an example you see that strength is generally lower, so you can still hit but you want to be more accurate then your opponent by having higher attack. The high defense is better to have then high Strength because it is better to hit frequently and decently while not being hit often(High attk, defense, hp and average strength build) to hitting good every once in awhile and getting hit by other opponent othen (low defense high strength and attack and hp build.)
Another good type of staking is MageBoxing. For mageboxing you can fight maxed players at the same level if you get 99 Defense, 99 hp, and 99 magic.
Either way when it comes to staking you want to have a high defense and HP always. Strength and attack are up to the stakers preference but usually it is better to have higher attack then strength.
My favorite build is 99 Attack, 80 Strength, 99 Defense, 99 Hitpoints, and 99 Magic. This way with this type of account you can stake mageboxing or simply boxing and be successful whichever you decide to choose.