Golong,
because of the breakage you've been experiencing, i'd be very careful about putting products on my scalp right now.
you could create your own moisturizer with distilled water and a moisturizing conditioner (one that agrees with you now). As you go on, you can add a couple drops of different essential oils like rosemary, etc. only adding one at a time to make sure you don't worsen the problem. your homemade mixture would of course be very loose and thin enough to use in a spray bottle.
the potential problem i see with using mango butter is that it has a combo of ingredients in it and it extremely thick and could clog your pores or cause irritation if put directly on your scalp.
mango butter ingredients:
Purified water, squalane (olove oil derived), caprylic/capric triglyceride (coconut oil derived), peg-75 lanolin, behntrimonium methosulfate, hexadecanol, cetearyl alcohol, ceterareth-20, dimethicone, phenyl trimethicone, Mango seed butter, cocoa seed butter, hydrolyzed silk, serica, methylparaben, propylparaben, butylparaben, fragrance, fd&c yellow no.5.
it's totally up to you though but i couldn't bypass your post without at least saying something.