OK I have noticed (in an arena game) that Ares chains stop working properly. The conditions for this I am not entirely sure on. Ares is supposed to be able to shoot 3 chains as long as he hits gods with the previous 2 before it goes on cool down. Sometimes after having already done this, the next time you use chains it will go on cool down after just 1 chain even if you hit a god. I don't know if this is because the 2nd and 3rd chain have a hidden cool down or not but that is the impression I was getting since it happened as I was using his 1 quite often with cool down reduction in my build.