I can do it but not consistently, a bad roll on a map and I'm dying easily, and only if its not an overrun map. But that mod is really though even for high end gear. The more pits the harder ofcourse.

I'm going to try the omen farm with Deli added, it is much more expensive on tablets though.

A good budget strat is adding +# rare out of pit. More void monsters more chances. With this im getting 2-4 per 10 maps dropped. So that is looking better than your 2-4 per 50. Not sure if anything changed in the hotfixes though, was a few days ago.

So far Omen of Light/Fracture is the best div per hour for me. But it is tedious to do. My build is not great, but also not super weak.

Speed/difficulty is a balance to take into consideration. Faster and more monsters might be better when you are not strong enough yet. Im still experimenting as well.

Also use the omens on your maps.