Hi Kinya

I also posted this, (sans the postscript at the bottom), where you asked Winsow about optimum embouchure for chromatic. He's the expert, I'm just a neophyte. But anyway;

i have recently taken an interest in chromatic harp playing myself and have similar questions. My interest is not only in blues, but other styles such as Irish music, and eventually jazz and classical. I recently purchased a book/cd package from, and written by, Brendan Power, called "Irish Music for the "C" chromatic; ( he does state that if you're going to play irish music with other musicians, you'll want chromatics in the violin/fiddle friendly keys of G and D and possibly A). He advocates tilting the back of the harp upward, and a pucker embouchue like in whistling as opposed to a more vertical corner blocking type.

PS: There is a book on Amazon called "Love of Chromatic Harmonica; Advice and Techniques From The World's Best" that looks interesting. It's about 600 pages. Amazon lets you "look inside" at the table of contents and first pages, and it appears they address embouchures. 

PPS: slidemeister.org has a forum for other viewpoints