Most of us have completely forgotten about Sandshrew and the fact that it spanks Phanpy in the attack department. This means Sandshrew would always be a better scarf (essentially, any set that doesn't use Ice Shard, Endeavor, Head Smash, or Special Bulk is 100% inferior to Sandshrew). While Phanpy is a viable CScarfer, you're going to have to say "Head Smash is the only advantage Phanpy has over Sandshrew, otherwise Sandshrew completely outclasses Phanpy as a Choice Scarf user due to higher attack and Rapid Spin."
<p>This set can also be used as a "tank", as it can be sent in later to set up Stealth Rock and start attacking off a decent Attack stat of 14. If Phanpy is used as a tank, Counter can be used to get a few surprise KOs due to Phanpy's high HP stat. However, be sure that you will KO with the Counter, as Counter revolves around the element of surprise.</p>
Phanpy has an attack stat of 15 with the EVs and nature you listed, but at the very least I think they should be changed to allow some customization.
I think the EVs should just be 116 HP / 196 Atk / 116 Def / 36 SpD / 36 Spe with Adamant / Impish. This way you can use 16 attack, or just 15 if you think it's sufficient. 16 Attack helps phanpy break Missy subs among other things.
Eitherway, that needs to be changed to either "15" or "16 (with an Adamant nature)"