You can't do what you used to do on OSI. I think it was non-guilded, in trammel, command your pet to guard you and stop.
A couple years ago the client was changed to get new options (Allow War On Pet is one), that default settings did not allow you to even attack your pet (eliminate the in war mode mount/attack confusion to the client).
Now you will basically kill your pet quick if you attempt to do the same setup where it allows you to hit the pet. In the case where it does not allow war on pet... well, you can't hit the pet. So no gains.
Gaderian