Basically, I want to get the Emperor's set for my main, since it's the best set one can get without spending money on the game as far as I can tell. But my higher leveled characters aren't good at Azwan soloing because of the enemy HP scaling being too high for unfunded characters (Plus Hero and Mercedes aren't good at mobbing to begin with.), most other characters are 120 and miss too much since the enemies are 140, and out of my four level 100 characters, my lowest leveled characters, my Hayato does well enough on Defend Hard Solo, clearing it in 6 minutes without Link Skills, but he doesn't get any time bonus coins, so I'm sure I can definitely do better than this.
So I'm wondering, does anyone know a good class and level range for optimal Emperor's Coin farming? Have a few character slots I could put to use during the months between now and RED.