Curious if you have found success and which advise worked best for you?
I myself had used many of the above advise on getting both my son's and my Conti tires on our tubeless wheels when converting to a tubeless setup. They were a pain! But was easier after making sure they were warmed up in the sun, made sure first bead was in the center of wheel well, and used the Pedro levers to finish off getting the tires on. Then soapy water to properly seat them without any further issues.
My sons bike was especially difficult, since the tires were originally on 20mm interior diam wheels with tubes. Putting them on a 25mm diam wheel as tubeless was not at all easy and why I put these in the sun to get them to be easier to handle.