Till as shallow as you can, and drag between tills to flatten and level the surface. Till, drag, till, drag, etc. The problem with deep tilling or disking is the disturbed soil will continue to settle (unevenly) for a couple years and you'll end up with dips and humps again. A shallow till and many drag passes gets you good compaction and a smoother finish in the long run.
Personaly I would go with the box blade and the scarifiers all the way down first..to find the rocks then till it.
Box blade followed by a drag.
Now that you have those options I'll toss in your other one: get a mixed load of sand and topsoil, drag, push, pull it level and seed it.
The sand will created an aerated, compact lawn that will take weight and be easy to maintain (it is how golf courses manage theirs), weeds will be easy to pull if you are OCD about your lawn.
I have been told mix ratio generally varies based on your soil and the topsoil that is mixed in. Once the root mat is established the surface is generally pretty resilient.I just watch a YouTube video on someone using a certain type of sand and his lawn did look like a golf course. Thank you for your advice!!!
My vote is the tiller. You'll never get the finished lawn you want using the box blade or discs. I've used them all plus a land plane, box spring, dozer, FEL & spring tooth harrow. With time and effort you can make any of them work to some degree of satisfaction I guess, but the quickest and smoothest is to start with the tiller. Just IMHO.I recently started mowing more and more land around my house to have a nice lawn. It’s about four acres, the rest I brush hog. It was pasture land and is rough on the kidneys and back so I want to level it. Should I start with a pto tiller, disc or box blade? I have access to all three. I’ll finish it with an eight foot piece of railroad track that’s heavy and flat. Thanks in advance!
My vote is the tiller. You'll never get the finished lawn you want using the box blade or discs. I've used them all plus a land plane, box spring, dozer, FEL & spring tooth harrow. With time and effort you can make any of them work to some degree of satisfaction I guess, but the quickest and smoothest is to start with the tiller. Just IMHO.