Is there any point in taking more than 1 SCH for Full parties?

[Draemos]

I'm just curious if there is any point in taking 2 SCH for heavy damage encounters like Titan HM.
We had a setup made of 3 healers 1 WHM and 2 SCH, both SCH claimed that they can't mainheal the group or main tank while our WHM didn't seem to have any trouble taking either role.
The SCH shields don't stack and their AoE heal for less than the WHM, yet I see some groups doing fine with 2 SCH.
Is there anything that makes them stand out if you take more than one?

WHMs stack better. So no, not really. That's not saying you can't do the content with multiple SCH though.