The videos are great, but they would be more helpful if they passed the levels using weaker level planes. It would be more motivating to know that you don't need a Tier III plane (10,000 diamonds) to get through this level in other words.

I have a Tier II 9-star and three Tier II 8-stars and can't advance yet.

I have tier 2 ten star plane but impossible to pass through.

Si se puede, pero debes tener todo con tier II - 10 estrellas, usar tecnologia avanzada y mejorar un poco las armas de la aeronave y listo. Con que tengas un poder total de 8 Billones y +71 Billones para arriba, si te lo podes pasar.