Autumn Lawn maintenance - which order?

This Autumn, I want to give my lawn a thorough going over, as I have lot of grass that appears to be growing sideways (along the ground) and turning white. I suspect my old lawnmower was to blame.
Anyway, my question is - which order do I do the following in? :::
Scarify Aerate with a hollow tine aerator Top dress Overseed Feed with Autumn lawn
I'm pretty sure that the 1st 2 are in the correct order, but waht abou the others?
Many Thanks for your help on this
-- gooner
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