Originally Posted by
Jene-chan
Even though some TMG PAs have Striking portions to them, you still want to go for R-Atk -- don't gear for S-Atk at all on Gu.
Also, it seems like you're settled on Gu being your main, but I would only suggest going for GuFi if you're going to invest into Atra TMG with S4 Life Steal from Gunslash. If Gu isn't your main or you only play it sometimes and you have a TMG other than Atra or perhaps Fornis, GuHu is the way to go since you basically don't have any survivability on GuFi outside of Life Steal (No Automate, No Iron Will, No Flash Guard).
Also, just to clarify, GuFi is a /significant/ DPS increase from GuHu. Considering the higher multiplier and the fact that S. Roll Arts is affected by more of Fi's multipliers, GuFi is the way to go if you have Atra. I just figured I'd clarify since GuHu, while still relevant, doesn't stack up to GuFi at all really.
Also, you won't ever be using Fi weapons on Gu. If Gu is your main, you'll probably want to invest in a Spread Needle for situational use and that's about it.