I'm pretty sure hobs will be the best single target dd.
There is no consensus. I don't think anyone else is even posting pet dd measurements.
I'm not sure how to gather vit, eva, or agi values from target mobs. that would be helpful for benchmarking.
There are a few situations where I'll say falcorr and lulush will out DD hobs.
Mainly its when in abyssea for falcor, because you have a great dd boost for crit hits from falcor, and they way the atma stack up, fantod can get some very nice spike damage.
also, for AoE lulush's whirl claws are really great for lower level stuff. you can do 1.2k AoE which can be very effective.