I was playing around a bit with cura and I created a profile which is not perfect yet but works...
Cura flux profile 0.15mm
Cura has a very interesting feature that simplify 3d does not or at least not that I know.
I made 2 test files in cura and exported the gcode...
Both a hallow vase mode cubes.
changes the flow rate from 110% - 90% in steps 2% every 5 mm
changes the temp from 215-185 in stemps of 3 degress every 5 mm
Good for testing new filaments...
edit: about 4-5grams of filament per test.
edit2: I am a bit amazed with colorfab pla/pha the layers bond well at every temp but 185-191 degrees look a bit matte and some slight artefacts. I probably will go with 200-203 degreees for that