Keep your blade and rubbers. If you can't hit with Korbel an G-1, you will not be able to handle viscaria and Dignics. I can't believe a coach can give such a bad advice.
What is it? Korbel? One of the Yinhe Pro blades? Viscaria?
Just go for something, train with that and get rid of all the others. You're not just indecisive about equipment, you don't know who to put your trust in either.
Guess what? Random internet weirdos who have not a single clue about how you play? Not a good place to put blind faith in.
Talk to your coach, like really talk to him. He knows 1000% more about your game than any of us ever ever will. Explain your doubts, your difficulties. Together you will come to a decent conclusion.