Originally Posted by
Pyonification
Edit: Wait, I just realize the guy in quote also sells his irons doesn't he? I didn't sell the irons I got from MB.
-Running PGate to get gold output right now.
Edit: Updated version of research.
While I don't have an awakened Betty, I have an Awakened Lyla. So I tried to use her for mysterious beast as mentioned by Eab1990.
I ended up with 4000~4200 gold a run.
To handle the air units, I had multiple hit squads of a Witch+Archer pair to hold the bottom portion of the screen to kill the gargoyles and red gargoyles. Once the gargoyles were dead, I withdrew the pair and allowed Lyla to keep wailing away.
Red wolves usually get through. When the slimes approach, I used Lyla's reckless abandon skill(or as ungracefully called, Risk Life III)
They other guy in quote claims 3600 a run with PGate.
Running it myself nets 2000~2100 gold a run.
Mysterious Beast is 20Charisma to PGate's 12Charisma
which means for PGate you get 175gold per Charisma.
Meanwhile Mysterious Beast gives 210gold per Charisma.
On raw gold gain, Mysterious Beast gets you 35 more gold.
Note: This excludes selling the irons you get, which could alter the result based on drop rates.