This is what I use for cooling and it works very well
This also does not block your view
Then I modified an LED mod to thishttps://www.thingiverse.com/thing:2810574
All printed in PLA
lots of print time on these so far, no issues.
I would also do all the other things that re recommended by others int his thread.
Also keep in mind that Every Roll of filament may/will act slightly differently.
You will need to adjust based on each roll
there is no "one settings fits all" mode.