I would use a field cultivator. I leveled 15 acres that had a vineyard planted 6x10 foot vine spacing. Removed with a excavator probably a 36 inch bucket. Scooped about 2 foot deep to pull up lots of roots. Doing 5 rows each pass of excavator, kind of windrowing the vines. The raked with a dozer. So one in 5 rows a little bit filled back in.
It got left with the pot holes for 2 years and pastured. Could not drive a ATV across it without falling in so holes. Ran a chisel plow about 12 inches deep 3 directions which helped a lot. Then 2 passes with cultivator and harrows. You could then drive across with a pickup and not beat it to death.
The land plane was used in furrow irrigated land. Low places would pond and kill off crop as well as take extra water to get water to the far end of furrows wet. But took real horse power to, part of why tracked tractors where so common for heavy tillage in the west. But water being a limiting factor, get water efference was worth higher cost to level.
A cultivator will not make it level to the degree a land plane would. But will round off the big dips and ridges. You need it worked close to a foot deep to have loose soil to move with a cultivator, for the kind of leveling you want. From another discussion here just days ago the older models that don't have as much trash clearance (cheaper today) are going to move dirt a bit faster.
In the steeper county in the mountains I farm in with lots of rock, the heavy 9 inch or wider spaced disc has been the primary tillage tool. Always prone to some ridging, generally used going round and round in a field. So I generally do field cultivating at a angle to the discing and back and forth to do away with any ridging. So to have as much benefit as possible from cultivating in you case at least 3 different angles would be good.
But not knowing your soil and rain patterns maybe making more loose soil is a recipe to create more ditches.
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