personally, i feel like SR has a decent drop rate if you can clear AQ4 (at the very least the mixed one so you have a chance to get every element).

it's not too hard to get SR stuff, cause with enough grinding , it's roughly 3-6 drops of them a day (depending on your grid). And there's a slight chance of even AQ2 throwing one at you (but don't count on it, i only seen it happen once).

but if people are worried about SSR, then that's where the point trade comes in... i'd easily get two good SSR rings from there (unless the SR stuff throws something good or a plat chest gives me something). then when you can get the 5 accessory slots, then you go and get the 3 tiaras...

besides, those acc points aren't used for anything else I know of... (unless they have something to do with the slot unlocks later on, but not sure of that)