Hi guys, i really need some advice here.

Here's the thing, i bought 2 phoenix thus, 35% light atk ofc i want 40% but it doesn't look like i'm gonna get it, require so much material that the only way i put my hand on 2 extra Phoenix it's if drop from Dia chest, i'm running expert like a mad man and got none Dia chest so far.

I'm thinking about buying the bow instead since my team it's basically Light (i can buy 3 so far).
Idk how the break limit scale works, what you guys think, if i get 3 bows should i break limit of one of them or just slot those 3, i really don't know how to obtain the most value here.

See below my team and stuff

imgur.com/a/NGdP6