As difficult as it can be to keep all of this information of your visions and spiritual connections to yourself, it must be done. You can't compete with the hivemind mentality of psychiatry from the inside. The psychiatrists are not going to back down from their years devoted to 'knowledge' and experience, even if they are wrong. I wouldn't mention your attempts at magickal incantations or anything like that to them, as they will only see it as yet another delusion.
If you can remember what it was like to think 'normally' (without any insight into the spiritual world, simplistic, materialistic, goal-oriented, etc.), use it. I know how stressful and anxiety-inducing it can be to try to get off anti-psychotics (it's an absolute nightmare), but any words against them or the drugs they are pumping into you will only be detrimental. If you have anything to say against them, keep it confined to this forum or other places that are sympathetic to your plight. They have to perceive you as 'normal' and complacent in order for you to have any hope to get off the drugs. Try to stay focused on immediate questions and societal goals (tell them you want to go to school, get a job, etc.; that will please them), tell them how the side effects are getting much better (even if they aren't), and stay far away from any spiritual conversations with them. At most, I'd mention going to church or something like that. You don't have to listen to their psycho-education (as you know it in your heart to be wrong), but you do have to play along like you're actually getting something out of it.
Your visions of angels and the like are very interesting to me, and I would like to discuss them with you when you get the opportunity, perhaps via private messaging. Maybe that will stem the need to discuss it with your psychiatrist/s.