Thanks!

+1 I like your guide.

I seriously doubt 25 in defense will give you a stronger laning phase than 9/21/0. The magic pen mastery is good on Shen since a correctly built Shen does nearly all magic damage.

At first, thanks both for your feedback.

About the masteries, I know is rare to see >21 points on defense, but after playing a lot with him, the masteries that fits more for my playing style are these one for the solo and jungle. Of course the ones you mention are a reasonable choice.
I mention the Gold Quints as an option in the runes section. Since I have those utility masteries I think is enough.
I will include the starting support build you mention. I play it too some times and I did not include it.

I go where I will of my own accord. Usually it's the new guides that come out every day, so it's no real surprise that you see one or the other of us commenting there.

Just as a side note, it's rarely beneficial to spec more than 21 points in a single mastery tree. The only exception that comes to mind for me is Singed.

The real problem with Laggermeister is that he is too smart for some of the other commenters in this discussion. And no, I didn't call for backup. Sirell will confirm this.

Anyway, overstatting in defense is bad. Your correct masteries should be:

For top and jungle: Either 9/21/0 or 0/21/9. Do not stat Summoner's Insight unless going 9 in utility.

For support: 0/13/17. 1/13/16 if you are willing to give up Pickpocket for Summoner's Wrath . 0/9/21 is also possible.

Also your runes are wrong. Armor yellows must always be flat, not scaling.

Support Shen should run gold quints, and his correct starting items are not boots + 2 wards, but Rejuvenation Bead + 3-4 wards + 1-3 pots.

Thanks, fixed. That little error happened since I brang here my usual support pattern and forgot to change that.

But as usual, Lagger is correct.

For example, Meditation on Shen?

Before I read ur guide I will upvote to cancel lagger's troll vote(as usual)

Anytime. :p And BTW, @Darkakuma, I can play Shen any lane and Jungle him except mid so Bot lane is fine. IMO. :)

It depends on the arrangement between teams before the game starts.

Lilarcor, thanks for liking my guide and your comment ;)