now just for the sake of having an opinion to state i will go into semi detail on this MU because i have nothing better to do today.
i personally think you need to shift your numbers by 5 to pit (55:45pit, 50:50 if kirby gets arrow) because even tho he can spam arrows like us if you stay at mid-midclose he does not have a reflector. we have two. plus at that range WOI into spaced fair, dair, or bair follow that up with various tilt/smash (based on landing placement) can pretty much shut him down. be careful of his grab range tho. it is deceivingly HUGE (seriously) and outranges our grab by plenty. however grabs are still important for us to use to get kirby to the edge. while gimping is not usually how you will be killing kirby, do not forget that hes dead if we mirror his UP B. anyways when you have him at the edge that is where you want to keep him as you can keep him pinned there for while with pit's superior edge guarding ability in this MU. anyways that's my 2 cents