I find the dance partner concept really interesting for a lot of the reasons that have already been brought up. It is a bit of a conundrum as to which player the DNC picks. I am not sure why NIN or BLM would even be candidates considering NINs will spend a good portion of time using mudras and BLM has no weaponskills to feed back over to the DNC, but I am going off of very limited information, and I ignore leaks.

I don't mess around with parsers, but outside a static group, exactly what guarantees lie in place for a DNC who does use them? If parsers give information over time so you can select a better dance partner, this is going to be ascertained through combat as well, just not to a numbers extent. However those of you who have been playing for a while, I know you can tell who is struggling and who is performing well without parsers. That first selection though in a PUG, no matter who it is, will be a shot in the dark.

Regardless of how well the job plays and future adjustments, what I know for certain is SE is not going to add/allow parsers so DNCs can determine the right partner. Whatever strategies are baking up in the ovens right now and in the future are going to have to be made without that ingredient.