Sounds good Shanti.
Powerful indeed. I have tried adding Siddhasana a few times, and each time I have to step back from it - although the overload seems less each time. Next after that is Yoni Mudra Kumbhaka which seems like it has even more energy potential. So it could be a long time for me to add those two. I suppose if I want to add on, Samyama is the place to do it.