Gums , still not clear..
Your rate of climb and time is unaffected.... right??.
Therefore you are achieving the same level change for a given still air distance??
( your flight path is obviously affected as you describe)
If you check your WAT climb limited graph, there is no corrections for head or tailwind
Needless to day this chart will not ensure obstacle clearance.. for this we refer to different charts..
Wish I could get 1 clear definite answer