Slowing down layer print time

[JohnnyV]

You misunderstood what I was suggesting (I was not clear).. You can set up different processes for different layer heights in the model with S3D.

I perfectly understood your suggestion, I do this all the time in S3D.

However, my point is it will not solve the OP's problem. No matter how much you slow down the layer speed for the top 10-20 layers, you are still going to have too much heat concentrated in too small of an area. Slowing down too much can actually cause more issues because the hot end is in the area for a longer time period.

In my experience, the best solution is to move the nozzle away from that "hot" area by printing another object on the opposite side of the build platform.