Additionally you have to keep in mind that lining up with bursts for the team like people did with trick means the rDPS contribution is actually higher than the 5% 1/6th calculation. Just as TA is higher than 10% 1/6th because of how teams effectively used it.
And people underestimate devilment. devilment is freaking huge. Especially when paired with both 5%s stacked on the partner for a planned burst. like it's literally ridiculous, and as crit gets higher its value will get higher as well.
additionally if you say a healer+tnk is nearly equivalent to a dps (its actually less but lets just say that for now) then a party consists of 6 character dps approximately. the 5% single target boost then becomes 1/6 since its 100% uptime. but you also have to consider it's placement on the top dps like a BLM where its value increases far beyond that.
So in short disregarding devilment entirely I'd personally say dancer is already stronger than TA because of the way its focus is applied. with devilment even more so. and dancers are barely performing less than NIN in pDPS if at all. and NIN is far FAR harder to play and maintain both the buffs and a good pDPS with than dancer. It feels bad
Also NINs potencies did all get buffed, but anyone that looks at that alone is forgetting the massive nerf we got accross the board with the loss of dripping blades. which was 20%.
So when looking at our standard GCD 3 before SHB spinning was effectively 180 post its now 200, (+20 total so far) Gust slash was effectively 240 now 250 so (+30 tsf) and aeolian was effectively ~ 410 and is now 420. (+40) so that big potency buff everyone talks about? yeah it barely happened. We got 40 more potency over 3 GCDs BUT since dripping blades applied to everything we also LOST potency on
Mug
Dream within a dream
Death Blossom
Shadowfangs loss of 10% slashing dmg bonus
Throwing dagger
and some ninjitsu.
So what looked like a buff to potency actually may have been a nerf over all because of the removal of dripping blades. It would take a lot of work to math it out.