It's each to their own.

# 1, prune the trees very aggressively ( if not sure how to do it, hire someone with experience; do not butcher the trees )
# 2, go to your local fertilizer store, ask what can they give you for a growth retardant, ( they need about 90 days of no growth for flowering ); apply correct measure.
# 3, after 90 or more days; it they do not flower naturally ( and it is not raining ) back to the fertilizer store, get a mango flowering agent & spray.
# 4, when the fruit is about pea size, spray again with calcium-boron. It will help you retain the fruit.
# 5, when the fruit starts growing in earnest, you will need to have a plan on how to deal with the fruit fly & other assorted visitors or you will not have any to eat.

If left untrimmed, they tend to flower & fruit every other year or less.
Mango season is now in full swing, you may want to wait a few month for the summer crop.

You put too much fertilizer, mango trees, unless very young, do not need watering.
No Mangos - Farming in Thailand Forum - Thailand Forum