What tools to use ??
I can give you an example of the problem I've been working on in one of our pastures here in the north.
It was reclaimed forest and bush about 20 years ago. It was seeded with a pasture blend of the time, used for hay, and grazed lightly. Then it was not used for about 10 years.
Much of the hay quality plants have not survived because of inattention I suspect. And bush brush has started to take back over.
My plan the last 3 years has been to brush hog mow every bit of it at least once a year. Some patches more often depending for instance, if I find thistle. I over seed with admittedly a cheap generic type pasture blend and annual rye. This is the best plan to eventually replace many plants I don't want with things livestock will eat. All on the cheap.
So my implements are a brush hog mower, disk, harrow, and a sub soil shank I use in places I want winter melt to drain faster or places I want maximum snow melt to go into the ground.
Regardless how you spread seed, the biggest thing is light cover on the seed, or good firm contact of the seed on the ground.
My 5 cents of experience and opinion.