overseeding after moss removal, topdress ?

Hi

I've just removed a hug amount of moss from my smallish lawn, (10 x 5m), and have been left with quite a lot of bald patches etc. It's also highlighted a lot of uneveness, small hollows etc

My plan is to topdress to help even things out and overseed. Should I topdress and then reseed, or mix the seed with the topdress ?

I've aireated after scarifying, any other advice welcome
Thanks

 

As its a small lawn mix the seed in but fill any deep hollows first.

I always use bagged top soil for making top dressing so as not to introduce weed seeds.