The fenugreek powder can be made in bulk and stored for future use.
To get a nice bright color to the pickle without making it too spicy, you could add the Kashmiri chili powder that has less heat and bright red color.
Some people like this pickle made out of slightly ripe mangoes. My husband is one among them. He loves it when the mangoes are slightly ripe and has a sweet tinge to them. I like them crisp and sour.