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50 S-Atk on BR skill tree, i'm missing Techer(15 S-Atk) class boost. 125 on Gix +32 Katana, 60 set bonus, 120 on units.

With Katana gear
http://i.imgur.com/g4ZhHXv.jpg

http://i.imgur.com/qS8O9Tm.jpg

Nitpick:
BQ rear: 35+30+20(+25)= 85 (110)
BQ arm: 35+30+20+30+30(+25)=145 (170)
Izane leg: 35+30+20+30+30(+20)=145 (165)

Halfline Slayer(100) + Deadline Slayer(150) + PP Slayer(200) + Crazy Beat(200) = 650. So Katana Gear gives at least 550 S-atk? How do you have 1833+ base S-Atk?

You can reach 4k+ in Character Info...