Ala and Esp have estimated times, according to Pokebattler, to defeat the boss in 131-135 sec, and Dnite has 161 sec.
Considering that you usually have 15-30 sec left when using mainly Ala/Esp I guess there is a big risk that DPS will be too low using only Dnites.
Just catch some high level Eevees (regardless of IV) and evolve Espeons, then let your nice Dnites finish the work. I use 2 DT/Hu at the end.