Heimdall AoA
Correct me if I am wrong but Heimdall should not be able to start a heavy attack while I am hitting his block. Sure, he is unstoppable during his heavy but that is after he starts it. OK, then I won't be hitting his block. The AI is definitely weird but I can play around it too. But when he does heavy attack at the same time as I launch my special attack, that is just him saying: "You just die now".
The saddest thing is this fight would be actually really fun if it worked properly.
Sorry about the rant.