Fezzik said:-1 to -3 up: Bad teasers.
-3.5, -4, -4.5, -5, -5.5: Horrific
-6: Bad
-6.5: questionable, but might work
-7: Typically solid
-7.5, -8, -8.5: STRIKE!
-9,-9.5: No good, use 7 point teasers, STRIKE!
-10: No good.
Obviously, when comparing any -5.5 chalk you like to -6.5 chalk you also like, the -6.5 chalk is a far superior play as a tease, since post tease using 6 points, you are getting identical pk'm lines.
I keep telling you that you should write a book about this stuff. Don't give me that crap about losing all credibility. There are some things that you write about that would not cause you to lose credibility.
You'll thank me later.