Once your oppontent has triggered their top heavy attack, throwing a heavy attack as a Shaolin Hero is a wrong move (you’ll be hit by your opponent’s heavy attack).
Knowing your move speed will be critical when reacting to an enemy. Your heavy attack will be interrupted by your opponent's heavy attack, which will land quicker.
Every hero has different move speeds; keep trying things out.
Whats that saying…
"If you know your enemy, and yourself, you will never lose."
Simple enough, right?
If you are looking for tactics, or tips on certain heroes, or gameplay strategy in general, there are plenty of resources online!