Ok ok, calm down... I just tried to share my opinion on this thread (while i just realized the last answer was 2 weeks old), i'm not saying that i know what's right and what is "noob and stupid", especially on my level.
I actually tried the Wriggle on a jungle Shen yesterday, and effectively my clearing time went up (especially when you got 3 proc in a row on your red buff :D ), so I aggree with you that it must be Madred's/Wriggle on Shen, and I think I will get only Madred's from now on, and spare that 900Gold from Wriggle for my Giant Belt/Boots.
And you're not forced to crush me if I say something wrong, and maybe stupid. Have a good day Sir.