It is quite simple to pick BIS tank gear. This applies to all tanks. Doesn't matter if you are a DRK, PLD or WAR. Crafted accessories are ignored in what i wrote below.
(1) Look through all the Esoterics gear for tanks. Look through all the Gordian gear for tanks.
(2) Left Hand side. Pick all the Esoterics or gordian pieces that do not have parry. If both the esoterics and gordian piece for that slot has parry, then pick the piece which has the stronger damage dealing stat.
(3) Right hand side. Pick those VIT pieces which do not have parry. For those slots which the VIT accessories has parry, put STR accessories instead.
(4) Done.

Note
This is only for tanks that do alex savage.
Note:If you are not doing alex savage, just buy full esoterics since you wont be able to get gordian gear anyway.