In which case taking mass hysteria at 103/104 is even less desirable for them, since they are even less likely to be in a voidform long enough to make good use of it.
I would be happy to apologize for saying 110 when saying, "before raids" would have been more accurate phrasing, but I'm not at all willing to endorse the reverse position that is implied, "Shadowpriests must get Mass Hysteria at 103
or your completely wrong!" See why I'm hesitant to simply apologize?
Just stick with the one you have, but aim to get both, you will have both so quickly it won't be worth the respec cost