Ward Against Foes vs. Grasping Earth

Why would anyone use the former over the latter?

Grasping Earth is a hex and can be removed; Ward against Foes is a ward and can't

Idealy, bring both, else just foes.

not to mention that grasping earth is a prophecies skill and ward vs. foes is core.

well ward was obviously better when grasping added armor, but now i think it might make its way onto some bars.

grasping earth used to add an armor bonus to enemy foes. That was recently changed in a skill update.
As people have said, the big difference is that ward against foes can't be removed in anyway.