The answer can be summed up simply:

"The best you can get your hands on."

If you're trying to rank 'best sets' for the i90 tier, the answer is summed up simply:

Top rank: Coil Drops
Mid Tier: Myth

Crafted is variable, but is generally not "best in slot" unless heavily overmelded, and will cost you both testicles given it's just been released.

Accuracy comes with your gear. Don't worry about it. SE will tell you how much you need by putting it on the gear they expect you to wear. They're control freaks like that.