My perfect string set is a set of D'Addario ProSteels. As close to a perfect string as I've used, and I've tried them a ton of strings. Consistent, string to string, pack to pack. They die evenly, none of that E strings dying before G strings. And the best value for pro level strings on the market. By the way, D'Adarrio did not stop making SloWound strings. Not exactly.
SloWounds were made by winding a string at tension, and controlling the speed at which the windings were applied. This process revolutionized D'addario's entire manufacturing procedure. So much so, they decided to make ALL their strings this way. Nickel Plated SloWounds became redundant, as they started making the XL series with the same process. Today, D'Addario XL Nickel Plated Steel series are, essentially, SloWounds.