the dicussion is going along nicely, let me add a few things:
This is spot on and, while probably not directly pointing at the OP, needs to be repeated because...
1) lots of MA students simply are not engaging their weaknesses directly enough; even advanced trainees often neglect that advice!
2) Strength is actually one of the easiest parametres to address directly, at least to a certain level- technique is fickle, on the other hand!
Maybe you learn a new twist or technique or sharpen out some flaws with your jab, but after competing you realize it doesn't work with your style.
Or the technique was garbage after all, trainers are often not super competent.
Or, when the adrenaline is punping, you cannot tap into the proper form.
etcetc, bottomline is, strength can and should be assessed fairly objectivly and usually improved, to a reasonable level
I love callisthenics, but it's more difficult (for a lot of reasons) to gain strength that way, especially if someone's a muscularly untalented and/or a lanky guy.
That said, the exercise that probably had the best direct benefit to my punching was the one-arm pushup (not sold on pistols).
Especially overusing the bench press WILL lead to damaging your structure (ie injuries) and mobility. Being musclebound is often refered to here as a myth from the bros, but in terms of martial arts it is a very factual, tangible cluster of maladies.
A long time ago, a friend from Hapikido class had a street fight and won.
Because they initially scrambled to the pavement, and he stood up much faster then the other guy -thanks to Ukemi! (the rest was short, onesided and ugly)
Something he never loved or payed much attention to up until that moment saved his pretty face a beating.
Well, what do YOU think?
If you know you could improve some key lifts from the following list without much complication by a decent margin, I say you should try.
If you can say that newbie and advanced strength gains time is over and now it'll be a battle of 5lbs weight jumps, I say don't bother.
[all done for 1-5rep max: Deadlift, Rack Pulls; Squat, Front Squat, Zercher; Strict Press, normal Bench Press, Dips, Incline Bench Press; Weighted Pull/Chins, Heavy Rows; Snatch, Clean]
I shall also add that heavy KB conditioning after training carries a huge risk of compounding injury.
In my opinion, this is regularly overlooked by enthusiasts.
I recommend doing it seperately or with a weight you can comfortably control.