We have noticed a big difference from when she took them so we really want her to get back on them
We have tried to apply whatever trickery we get from the groups we are in
We have gone through a slew of different meds and delivery systems that she outright rejected because of nasty taste or hard to ingest.
The only reason we are getting our of her is that if she takes them, we (the parents) win and ergo, she looses
Can you really not see a connection?
Does she feel better on them, or is she just easier for you to deal with?
Kids know when you trick them, and every time you do, they lose trust in you. Autistic people especially value honesty and directness, we often see right through the bullshit. Stop playing tricks on her, and start working on building trust back.
She may absolutely benefit from the medication, I am not her doctor and I don't know anything about her, and I am not advocating neither for nor against it, but from what you have said, it sounds like you've put her through a hell of a lot to try and find something that "works", but it doesn't sound like it's working for her, not at this point anyway. If the medication makes her feel better, she'll probably want to be on it again in her own time, or she won't, and then either way - you have your answer.