Miss Chez i hope you are still there, and have not run away, who would blame you !!!
My first boy was exactly the same. After 12 months of trying everything a 70year old BHNurse gave me the best advice and now at almost 5 he is the best sleeper of all the kids i know. Guess you want to know what that was. Well she said "STOP" you are doing something different every 2-3 days or weeks, you need it pick a style that you think you can do for the long term and stick with it for at least 8 weeks. By 12 months they are so confused as to what you want and mean that they can take a long time to sleep well. I used "save our sleep" and it took some time 6weeks at least but he did get it. He to would sit and stand in the cot and that book dealt with it in a way i could handle.
My second boy has refux and is now 8.5 months old and i used the same book with him and he sleeps well for a refluxer( most of the time). So choose something and stick with it, be strong, get help if you need it and focus on the end goal !!!!
Please keep me posted, i really do feel for you, this can rock you as a mum.