I do not consider Freddy to be a typical slasher(Dont ask me why).
So these would have to be my favorite slasher sequels.

In order

1.Halloween:H20
The only sequel that lived up to the classic original.

2.Halloween 4:The Return of Michael Myers
Even though I dont consider it a true sequel,I still liked it.Especially Kathleen Kinmonts G-string ass shot along with her whole bra removal scene.

3.Friday the 13th Part 6:Jason Lives
I love the Alice cooper music.If the scene in the camper with Cort and Nikki doesnt get you horny,what Will?Plus the sheriffs daughter is a hottie as well.