No it is not.
4 man content is irrelevant, and you can do more dps with aero.
8 man content if you run with a WHM in existing content there is no need for stoneskin on the SCH. (obviosuly 2 SCH is different).
Future content? I find it highly unlikely that when pushing content with minimal gear that aero won't be a bigger advantage then stone skin. However, it is possible depending on mechanics.
Luckily you can can change on demand....

By the way, If you don't know any uses for surecast you are bad.