Wow, congrats! That's pretty impressive. :D
I haven't managed to do that, no. My S to S+ journey was very tedious as I had difficulty in finding a good team composition who worked well together. In the end, I gave up using my main weapons and decided to use weapons with Echolocator and all of a sudden it wasn't all that tedious reaching S+ anymore.
I think when trying to reach S+ it's important to remember that it's definitely a team effort; you're all trying to reach S+. Assisting my team with Echolocator helped greatly, and I was able to reach S+ quicker than I thought. It's just about filling in the gaps and considering ,"What's missing?" and, "Why am I losing?" It took me a few losses to understand that.
Wow, I got a bit carried away, ah ha ha. Anyway, congrats again on your awesome feat! Do you mind sharing the video?