What's my BiS for 4.2?
tl;dr this: 
http://ffxiv.ariyala.com/14ZJP (either Crimson Cider or Tako-yaki, both foods are good)
This set is a 2.43 GCD and has the highest dummy DPS simulation. If you prefer something faster like 2.38-2.39, swap in the Tome pants. The difference is within 20 DPS on a dummy, i.e. negligible.
If you want to take a look at the other options we tested to find the BiS, they are all documented in this Imgur album, including sets with Crit melds: 
https://imgur.com/a/pDfTl
All of the sets were simulated with the assumed party composition of DRG+NIN+BRD and SCH+AST. This is only really relevant for comparing the Crit stack set against the DH stack set and should show how much more powerful DH is than Crit on PLD.
What if I don't want to use crafted?
Play another role. This one is probably as good as it gets: 
http://ffxiv.ariyala.com/14XJC(bearbeitet)