For yhcl always start at a low dose like 2.5mg to make sure you tolerate it well then step up your doses slowly to try to hit .2mg / 1kg of bodyweight. So if your 75kg go with 15mg, best used in a fasted state
I think ec stack is going to be stronger for you, and definitely more appetite suppression. I prefer yhcl because it doesn't make me feel cracked out like e does.
I also have know people that have done ecy stack.