I would say the general loot spawn of Perfidus is fine, gold wise, each monster aka (Demonoligists-Fiendish Fanatic) drops a supplus of sellables, wich if you have enough inventory space to carry out adds up to compensate all consumables required for the dungeon. Aswell as the resources for Alchemy.
End loot is quite a let down, the final room is intense and overcrowded, DC's are very high, though i would say raising them to Har'Akir lock standard with traps would not be an issue for the CR of the place, but some decent shinies in there would not go amiss, somethings that you can only find in Perfidus, rather than stuff you can also snag elsewhere would be cool.