Begin the editor and select the combat difficulty of Infernal & Make sure the Select Player(s) area is Dante only.
Select Edit Arena, then Edit Wave the follow these steps:
On Change Mode select Kill Em' Quickly
Select Minion and press Y for Enemy Options:
Max out the number which whould be 14
Max out Health for the enemy and change their style to Brutal
After this Press B and then while on the Wave Navigator Screen press RT numerous times to Duplicate that wave, watch the medal on the side till it goes Gold then press 'Back' and select Save & Exit.
You should now be back at the Trials home now select your trial and press Y to upload it and done.
As a note if you wish to delete it press RB on the Home screen to get to Uploaded then highlight what you want gone and press LT