By Brian Sheerin and Emma Berry DEAUVILLE, France--It was the bloodstock sales equivalent of a mic drop: two lots, five minutes, €3 million. Boom. Coomore has long nurtured its partnerships, and with Peter Brant, Michael Tabor, Derrick Smith and Georg von Opel's Westerberg, the Magnier-led operation has enjoyed plentiful success. Most notably this season that has come with Paddington (GB), a multiple Group 1-winning son of Siyouni (Fr) bred by Dayton Investments at Ecurie des Monceaux, and it was to that nursery that the team turned again, signing for the...