It is close enough that any further sacrifice of secondary stats for accuracy would be a DPS loss, basically.
Also, according to the work being done here, DET is more important than we've been giving it credit for. I've tested this formula against in-game numbers and found it to be accurate. I've also messed around with stat weight calculations, and came up with some unexpected results.
The weight of WD and CRT scale up with INT and DET.
The weight of CRT scales down as CRT goes up.
Because of how everything is itemized though, this only changes 1 item in our set.. the head item goes from Summoner's Horn (noooooooooo) to Allagan Circlet of Casting.
Edit: Definitely more than 1 item is changing. :P Went back to experiment more with other BiS potential sets, I had overlooked some...
Old BiS:
Allagan Grimoire of Casting
Summoner's Horn
Summoner's Doublet
Summoner's Ringbands
Allagan Rope Belt of Casting
Allagan Breeches of Casting
Allagan Boots of Casting
Hero's Necklace of Casting
Tremor Earring of Casting
Hero's Bracelet of Casting
Hero's Ring of Casting
Vortex Ring of Casting
448 ACC, 709.2975733 Weighted INT
Weights: WD = 5.990694731, INT = 1, DET = 0.282081229, CRT = 0.178082387, SS = 0.084943755
Food Benefits: Eggs = 24 CRT = 4.273977288 Weighted INT
Food Benefits: Buttons = 13.1 DET + 10 CRT (DET = 3.6952640999, CRT = 1.78082387) = 5.4760879699 Weighted INT
New BiS #1:
Allagan Grimoire of Casting
Allagan Circlet of Casting
Summoner's Doublet
Allagan Gloves of Casting
Allagan Rope Belt of Casting
Summoner's Trousers
Allagan Boots of Casting
Hero's Necklace of Casting
Tremor Earring of Casting
Hero's Bracelet of Casting
Allagan Ring of Casting
Vortex Ring of Casting
448 ACC, 720.1609947 Weighted INT
Weights: WD = 6.120637211, INT = 1, DET = 0.282081229, CRT = 0.186039777, SS = 0.084943755
Food Benefits: Eggs = 19.45 CRT = 3.61847366265 Weighted INT
Food Benefits: Buttons = 15.25 DET + 7.78 CRT = 5.74912820731 Weighted INT (DET = 4.30173874225, CRT = 1.4473894650)
New BiS #2:
Allagan Grimoire of Casting
Allagan Circlet of Casting
Summoner's Doublet
Allagan Gloves of Casting
Hero's Belt of Casting
Summoner's Trousers
Allagan Boots of Casting
Hero's Necklace of Casting
Tremor Earring of Casting
Hero's Bracelet of Casting
Hero's Ring of Casting
Vortex Ring of Casting
448 ACC, 720.1609947 Weighted INT
Weights: WD = 6.120637211, INT = 1, DET = 0.282081229, CRT = 0.186039777, SS = 0.084943755
Food Benefits: Eggs = 19.45 CRT = 3.61847366265 Weighted INT
Food Benefits: Buttons = 15.25 DET + 7.78 CRT = 5.74912820731 Weighted INT (DET = 4.30173874225, CRT = 1.4473894650)
The food benefits are without re-calculating the weights, as it wouldn't change dramatically with the fairly minor benefit of food. It would change, just not enough to make eggs worth using at i91.
So we have 2 new BiS sets that are identical except for the belt and a ring slot. Due to Hero's Ring being the same as Allagan Belt and Allagan Ring being the same as Hero's Belt, those 2 sets are interchangeable.