Finally I got the plat.
Thanks for the tips, dudes. The only thing I'd like to add is: Use Andromeda without cloth for the soldiers sections, his Nebula Stream (I think), w/ R1 is awesome, it kills everithing around you and search enemies in front of you, spamming it finishes all levels in less than 3 min.
For missions alterning soldiers and gold saints, pick Andromeda with cloth, remove the cloth for the soldiers, and for the golds charge R1: with most difficulties it will break de defense, and deal good damage. The only that makes you change strategy is Capricorn, but just dodge and spam.
Now I'm going for Gold and God story mode