Infraction: 10. Do not respond to terrible posts.
Message to User:
"How do I gem?" is one of the most basic hand holding questions. There are guide sections to this in the OP of each spec thread. You know better than to hold their hand and answer this one, should have just reported it.
You should never gem for hit/expertise over strength. You cannot reforge to strength, so your only source to get more of it is through gemming. Whereas you can reforge to hit and expertise. Simple as that.