Well as it's used to calculate the climb speed the best wind to use is the TC wind as it's the closest thing you have to the experienced wind during climb. If you put average cruise wind of a 2 hour flight you might find that the climb wind was a tail wind of 60Kts and have an average cruise wind of +30. The climb will be totaly wrong.
If in your flight plan you can find an average climb wind then use that.
On the cruise wind in the LEGS page use the flight plan winds.