Any tips for ESA assessment?

I've an assessment coming up and I'm concerned I'll be found fit-for-work - this is a reassessment, I've had two previous ESA assessments, with one appeal, and had two previous PIP assessments (not granted). 

I'm Autistic with ADHD (I also suffer depression and anxiety, which includes not being able to use a telephone) so there's a MASSIVE difference in my ability to function from one situation to the next and it makes finding suitable work very difficult, not to mention I can't even get voluntary work right now due to lack of references! There's no ASD or ADHD services locally so I've no proof of disability other than ASD diagnosis and DWP seem to think because I can't get help that means I don't need help so I'm fit-for-work.

If not on ESA I've no other options as I can't get a job and they won't let me apply for JSA as I can't follow job seekers agreement - it's a joke they argue I'm not disabled enough for ESA, yet I'm too disabled for JSA. 

I obviously won't fake disability but I'm scared about all the ridiculous judgements they make, like if I look too clean or well dressed they'll take away points, also I'll have someone with me but don't want them to see how bad I could get. I'll not save spoons or try to pass for NT like I'd normally do when I leave the house, so I can try to show a more reasonable example of what I'm like, but I hate the idea of not saving spoons in case I have a meltdown or become suicidal...sure it *might* help pass the assessment but I'd also be at risk! 

I'm so worried if found fit-for-work I'll have no income over Christmas...I'll have to try to appeal, and if I don't get my appeal I risk no income at all until I can re-apply for ESA again but I'd likely have to have the lower rate so I'll still be in trouble!