No, you don't have 1st class fast trainers.
Those are faster than others but still gonna need extra greens to develop them as the 1st class.
Only for those 4 I would spend extra greens
Why not Kidam?
He's 4* and a half.
At that level 4* FT is worth 50M and 5* FT is worth 61M. So his value fit for a FT. Kidam would be the only I would train...