If you have unlimited gil go crit/det and then buy i110 crafted accessories and meld in the accuracy you need at any given point. Arguable BiS right now is going to involve 2 i110 crafteds penta-melded, 3 i130 dps accessories, i130 on the left side, focus on 558acc with food, 390-420 sksp depending on your latency for 9-hit zerk, then det/crit in that order.

You should have no less than 10k hp for T13 (I've been progressing in it with no problems on my HP with 9950, but my healers are boss). After you get to 10k hp, 558acc, 410sksp, just go STR>Det>Crit.

I know that was long winded but its a complex question to answer depending on your current gear :/