I am currently overloaded with work, and am holding off on accepting new signature work. I will update my OP and make a new post on the thread when I will be accepting new work again. Sorry for any inconvenience.
Lz, you know that thread you made, for me. :P Can you make that a gif and I post it into my signature?
This varies so wildly it's hard to answer. The easy answer is they spawn VERY slow compared to all the other mobs. Wiki says 10% as often, but in my experience, it seems even slower than that.
Hahaha sounds tedious... By the sounds of your large chest of slimeballs post you've obviously spent quite a while at your slime spawner :) Recently my friends and me found a slime chunk and im not entirely sure of its exact whereabouts but we've already encountered 2 slimes which I believe were spawned near this massive lava filled ravine. So I'm wondering what design did you use?