2.

What is the ilgiyae specifically? Ilgiyae is your own technique you have chosen.

Ilgiyae should be chosen this way.

Choose one of technique among those which you have seen and learned in the training. It should be the one which you can do best, which you like most, which you understand best, and which you trust most.

The one that you like most may differ from one that you trust most. In this case, choose anyone. But generally you will trust a technique that you can understand, and you can be skilled in that technique only with this assurance. You will like the one only when you are skilled in it.

Anyway, it is important to choose one. It doesn't matter even if it were not the best choice. Don't be troubled for your best choice.

When you are a beginner you should practice and repeat it several million times or more. So you should be able to subjugate your opponent with it in any situation where you use it, whenever and wherever.