Critical Strike for Every companion

Petty Officer
Dec 16, 2010
I just want to clarify why do only a few companions every get a critical strike epic??? I have notice that not every companion does and I would like to know why. As in some cases, the companions you have to pay to get promotions have the option to choose as one of their new epics for a critical strike. Why is it that some companions have it and some do not? Like for El Toro, he has a high critical chance rate but I see no button. I am not saying we should add it on but out of curiosity why do some companions have it while others do not???