Rod bracing with high quality all thread, washers,bolts placed at strategic locations will hasten the inevitable split and shear of this trunk. Multi trunked trees that fuse together is a waiting time bomb for bad weather with down burst wind drafts. AFter the bracing is done, then topping off heavy outer limbs, and over hanging limbs is the best effective methods.
As far as treatments for EAB, that is another question. Subscribed.
Either way is costly, but is it as costly as replacing the home structure when this mega ton tree comes crashing into your living room or bedroom.