We have to assume that the average player will never get their weapons to 6* let alone to the 11* or 15* breakpoints to have the C. Ability of a weapon upgraded so with that in mind the potency of Nightbloom on the Sun Umbrella is quite low so I instead went for Cloud's gear to maximize the Water Damage and for the Circle Sigil Boost.Don't say that about the sigil man. I've got no chance of getting it.
Questionable stats of the Sun Umbrella aside I really wanted the Aerith's summer outfit but I'm 10 stamps away and I don't feel confident I will be able to get it without spending money so my only hope is that they add these outfits to the outfit shop eventually and I can grab it with an Outfit Voucher.