For lv4s check out burner missions, I’d expect around 200mil/hr. Main ships are the Machariel, a few cruisers for the bases, and a bunch of frigates for the rest.
This first thread has a pretty good overview and covers most of what you need to know.
And this thread has a bunch of alternate fits.
and check the forums after patch day, often something gets broken and that typically gets posted in one of those threads.
For carrier ratting best to join with one of the big null groups as they have a lot of well protected space where you can rat. Lv5s I think most runners do carrier blitzing not sure how hostile the areas are though. I’ve heard a lot of good about WH ratting, but no idea what the income/safety levels are. Have also heard good things about FW mission blitzing.