Um, not sure if this helps any, but my toughest Pokemon was Lv 65 when I beat the E4... Try to load up on cash and by lots of Revives and Full Restores.
After another look at your team, use your Noctowl to knockout Aaron, but use Infernape on Drapion,
Use Octillery to wipe through Bertha while switching for Scizor to take out Whishcash
Heal up Octillery then take down flint (it might be good to have Ether hear)
For Lucian personally, I think your screwed, all I can say is use Infernape to kick Brongzong's butt, maybe Garchomp would be handy hear
As for Cytnthia? Heal up everyone you've got. Use Infernape to take down Spiritomb and Roserade, use Gallade on Togekiss, use Noctowl on Lucario, use Scizor on Milotic, and use Octillery or Carchomp to sweep the floor with Cynthia's Garchomp