love the back and forth here. honestly these are things that should be standard knowledge by now, not that I knew any better. having legit teeth setups while minimizing all escape options and having an answer for them, getting parry science developed, maximizing damage off of teeth will be good for everyone.
joker is slept on no doubt and if hes developed more then he should move up a tier. not to say he doesnt have a ton of problems, but imo being zoned out is not one of them. Coming from sf4 and marvel, I'm amazed at how people have trouble blocking and then dashing and blocking in anticipation. you can't even do that against sagat's tiger shots full screen, you can only walk granted the speed is much faster esp if youre bison or akuma.
also, the hardest time against deathstroke i've had is when they are full screen and not doing a single thing but simply waiting to react. reactionary zoning is a tough game to play against with joker, but if they're actively trying to keep you out, you shouldn't have too much of a problem closing the gap with patience.
edit: sinestro's trait however makes it really hard for joker. mb armor absorbing safe crowbar will help Joker a lot as something to throw out to cover some ground. unreasonable request?