First of all, I hope this is in the correct section of forums. Looking at the previous threads it is. :P
Moving to the point, Shen is by far my favorite tank champion. I know he doesn't really have a place in the meta / comp game due to how much gold he needs to succeed, but I usually play in a solo queue anyway (at least for now, only Level 23).
Due to only being Level 23, my mastery is not fully complete, but it is currently 9-14-0.
I took attack damage (Brute Force), summoner spells improvements, cooldown reduction (sorcery), and magic penetration (arcane knowledge).
Then the (start) of the generic tank defense tree.
Again, due to Level 23 my rune page is not complete (I also need a new rune page just for Shen), but I use magic penetration marks, armor seals, magic resist per level glyphs, and attack damage quintessences (will be replaced, only ones I have right now)).
As for my actual in-game build, I choose flash and exhaust for my spells.
I typically start with boots + health potions.
First trip back I upgrade my boots into mercury's treads and start building my sunfire cape (sometimes buying more health potions / wards as well).
My late game build usually looks like:
Mercury's Treads, Sunfire Cape, Aegis of Legion, Randuin's Omen, Banshee's Veil, and Frozen Mallet (assuming the game goes on long enough).
Is this a viable build for Shen?