Mreow! This thread has EXPLODED! Good stuff on both sides. Parts of the evidence I've seen posted on this board in the past have been challenged in this thread, which is good to see. The evidence, though, has been defended remarkably well. Hiei would definitely win this match with ease. If Seikouki is equivalent to a low S class power, then Hiei as an S+ class cannot be beaten by Vegeta.
If you look at eastern mysticism, the power of Seikouki as Sensui described it is similar to one of the legends about the Boddhidharma. The Boddhidharma could master and harness the forces of creation by merging with nature. Sensui stated that this was also one of the powers of Seikouki (merging with nature). The Boddhidharma managed to gain his power by transcending the Samsaras and attaining Nirvana/Enlightenment. This is a pretty big power, as it can be seen as a link to the Divine (enlightenment by being of the Dharmakaya, which is similar to God and Brahman). This is probably what Yoshihiro Togashi based Seikouki on, given that many of his creations are based on eastern mysticism. This would also explain many of Sensui's other statements about his power.The only difference is that Sensui did state that he did have difficulty wielding his power, and that he had "nearly become a god". This suggests that although he had the divine link and was capable of transcending the physical realm, he had not yet fully embraced Nirvana.
There are some other very interesting parallels between Sensui and Boddhidharma. Boddhidharma attained his enlightenment after nine years of facing a wall. Sensui disappeared for 10 years, and mastered Seikouki before that ten year period was up. Boddhidharma also sat in a cave during his nine-year meditation, and it is said that his shadow became etched on the wall. When I heard that, I instantly thought of the Irima Cave with the Ura Otoko on the wall, with Itsuki inside watching over Sensui. I haven't yet finished reading about the Boddhidharma, but it is all very interesting.
I found all this very interesting stuff. This is not an argument, as the eastern mystical foundations of the idea of Seikouki aren't actually a part of the YYH canon itself. However, it can be a good way to peer into just what Yoshi may have truly meant by Seikouki, and why he wrote what he wrote. This is actually my Bible Study side showing: in order to gain a greater understanding of the Scripture, it is neccessary to understand the full context in which the Scripture was written. This often means reading history that occurred beyond the Scripture. But when you come back to the Scripture, you have a MUCH clearer understanding of it. It's only natural of me to do the same in all of my "studies", lol.
Enough deep and meaningful! Was Nefelpitou, the Chimera Ant King's elite Royal Guard, ever deep and meaningful 24/7? No! Only in short, concentrated doses! So, check this out:
HIEI VS. VEGETA:
Lol. Enjoy! Keep safe everyone!