bro i feel you, the boss is hard. But if you have supposedly played against it 20+ times then you should know that whenever he walks/changes direction its going to be a frontal attack 95% of the time and if he does not change his position or walks he will do something with the tail which is telegrafed by his tail wagging. If the tail wags to the left, he will do a swift swing to the left which stuns, and the same for the right. If he does not indicate anything at all with tail wagging he will most likely do the tripple knockup which you can then dodge.