The second and third pictures remind me of "mouse ear" in Pecans, due to lack of Urease Enzyme to fully process urea--- un-utilized urea accumulates in the tips of the pecan leaves and kills the cells there. Nickel is the central atom of urease, so when there is Nickel deficiency, urease can't be made. Though Nickel has long been dreaded as a poisenous heavy metal contaminant, many plants actually need just a trace of it--- even less than is needed of Molybdenum.
I'm not aware of anyone's having studied Nickel in Mango trees, so I am speculating about relevancy here.
You can get some Nickel by applying Seaweed Extracts, or by using fertilizers containing Nickel "contaminant." Find out which by visiting Washington State's specialized website for heavy metals in fertilizers.
Avoid using any fertilizer containing Urea.