Well if we go down to the legal brass tacks, specifically the ToU states :

"You represent that you are an adult in your country of residence. You agree to these Terms of Use on behalf of yourself and, at your discretion, for one (1) minor child for whom you are a parent or guardian and whom you have authorized to use the account you create on the Service."

So if the account is in your name and you are allowing your son aka one (1) minor child to play it, then yes you can play on this account.

If the account is in your son's name then you are not allowed to play it. AND, it is quite possibly a violation - unless your son is an adult in your country of residence.



As far as spec goes, either will work just fine for Stocks/SM. Whichever has the better gear aka gives you the biggest ticks on Consecrate really. Also you want Pursuit of Justice but this is obtainable with a Holy spec anyways. You will want to use something other than Retribution Aura for gathering up, switch to it when you are ready to burn them down.
Just keep Sacred Shield up on yourself, pull as much as you can, then kill them with Consecrate and whatever other attacks you care to use. It's really pretty simple.