Keep it at the edge of death...
Decrease water, nitrogen, other needed minerals.
"Re: Can you attentionally turn a vigorous mango variety into a runt"
Cut it's lateral & tap roots often with an axe, pick, mattock, etc.
Keep new top visible growth chopped.
Get your knife, tourniquet string, axe, weedeater, etc. and consistently cut through the bark and cambium; forcing the tree to continue to heal the trunk and limbs rather than upward growth.
lol... then if it still wants to grow throw very very small amounts of salt or other substances known to kill trees if applied in large amounts...lol....
Have I ever done it? Heck no, Do you think I'm Crazy??? lol
No, Really I have done some to stimulate bloom vs. growth but not with the intent of creating a dwarf.