My only worry, how will it work for SCH? If its a separate skill and cross-skill for SCH, the problem is that SCH already has 5 must carry cross-skills. This 6th one would not have any space. If this becomes the case, I will only carry the original Stoneskin for use during combat. That's more important to me. Personally I believe party stoneskin should only be done during progression fights. If you're a competent healer, it's not needed on farm content.