Quote Originally Posted by sanahtlig View Post
Getting an SR to the same level as an R takes exactly the same amount of resources.--
True. And that would yield 2% compared to 3%, probably mostly covered by the base stat difference. However, you're then stuck with an Accessory you can never again enhance - not without an absolutely ridiculous Gem cost. Not that you need to since the performance is already roughly the same, but... whose autism will allow a non-max level item?
Quote Originally Posted by sanahtlig View Post
-- A full loadout of SSRs with 3x ATK+ each (9x total) will only increase damage by 24% (including the effects on base ATK rating), and only for that character. --
24% is absolutely insanely huge, though. We're talking P2W Eidolon level of increase.

... of course, not only that Belial and friends are team-wide, but you're also basically never going to find even a single triple Atk+ SSR. Much less three. Even less ones for the whole team. Not that you'd even want to use them over Affliction+ Accessories on your debuffers.

But still, let's not call 24% as "only." You put that on the carry of your team - best case SSR Cybele - and your team is a now a monster.