Last I checked, first bash should stun IF you don't have CC immunity, second one that you won't stun but will still interrupt (though it sometimes bugs and you can't interrupt people again) when you have CC immunity.

Personally, I don't slot it on my templar because there is no point where I would use it that I couldn't kill with another skill, except maybe if I were in the back of a zerg or using a build that can do 4K+ ticks on someone before they ever reach execute range (such really exists this patch , actually you can do more than that...).

Then again I don't really like cheese, as much fun as it is to insta-kill people with that ray from execute range...