Summoner got destroyed this patch

[PriyaJugulataris]

You can also get HQ i70 jewelry and do a 9 INT 9 MND 9 VIT 6 PIE 12 Acc build on every slot. VIT and PIE helps a lot and the loss in INT from i90 is a very small difference in DPS. Some pieces already come with Acc so just place the the Acc III with something you prefer.
VIT IV +8
PIE IV +6
Acc III +6
Acc III +6
VIT I +1

This isn't viable for most people economically.

[OmegaNovaios]

This isn't viable for most people economically.

That's true, but like all things it's something you can work towards if it fits your goals.