Let's talk about 90s Accessories.

[Amaret]

I don't think any of those pieces are even close to BiS -status (for a SCH), no matter what the melds. The MND-difference is just too big to justify some little Crit. Sure, you could have fun with some VIT melds, but then what? Unless you're undergeared for T9 with your left side, you wouldn't need VIT anyway.

Apart from that, you have 2 i110 items with Crit on them (HA earrings + bracelet), so for those slots, the i90 accessories are worthless by default, if we speculate BiS-statuses. For the other three accessory slots - you have the Daystar ring with plenty more MND+DET over the i90 crafted ring and then the Judgement Ring of Healing with DET+Crit, those two being SCH BiS. (The Judgement Ring of Healing has enough DET to make it shine over the HA-healing ring due to its crit, whereas the i90 crafted one won't be a match for the Daystar ring with way more MND and DET to boot).

The only slot in which the i90 crafted could be even reasonably good is the necklace slot. Even then, max DET + crit -melds won't save it from being inferior to the two i110s. Sacrificing some MND for Crit can be okay, but if we're talking about like 4-5 MND's worth for some Crit only (the i90 with max DET melding), it's not gonna be worth it.

Unless you're making an accuracy-based DPS-set with these accessories (which could be achieved with i90 left side items too, as Seravi said), they're not gonna be worth it.

Do you even know how much (less) MND rly influence your healing output^^? It just proves the fact the Main Stat > ALL is so hard hammered in every head since launch, which doesn't allow people to think out of the box...

With Neck, Earring and 1 Ring i'm losing 15 MND. 15 MND is literally near no difference if you count in the gained DET. (That without counting in the Party buff)
If you only cap DET / Crit you gain:

22 crit
33 det
--> if you used 4 Mats there is still place for 1 Vit 8 Materia.


Also, since when is the "BiS" standard limited to SCoB? For SCoB T7 Savage, you need more hp which will be achieved by this without losing any healing power (even increasing your chance for adlos).
More HP in overall without losing the healing power you can achieve with max gear isn't that bad and will help in hairy situations.

@DPS: Yes, i don't care for MAX DPS but i still dps, even with my 400 ACC i'm at ~100~120 dps. It could be higher, yes, but there is no need for it... otherwise i can reroll a dps class and let the WHM (SCH) try to heal it solo. (And i'm 100% sure its possible... since 110 is way overgeared for SCoB)

BiS for me means, to be prepared the best way for new content.