healing question

[Ghishlain]

so a question about the healing in perticular. do i absolutely need to cross class stone skin or will i be fine without it?

In content where you'll absolutely need Stoneskin, chances are there's a WHM there to use said Stoneskin.

In any other content, it's generally a nice "bonus" to have though finding times to apply Stoneskin as a SCH can be difficult depending on how quickly the party wants to progress.