Mizuno makes the best iron, hands down. (Sorry Titleist!) :)
Probably the best forging method? The Mizuno lines looks very nice. I'm not sure per say it's the best. Best for who?
I've been comparing them, AP2/MP59, side by side or at list I give them both the same amount of time and trial, but I take no bias to either one until I'm sure which one I fall into.
I am not a professional certified person to give advice, nor am I a good golfer, however, for the sake of the topic, the one thing that really matters is the club's engine (shaft) and without it being correct for the chemistry of the player and the clubhead weight, to which need to match up with your club head speed whether you are fast, slow, med, I think is very important. If the reading reads "regular shaft", don't buy the stiff and then sign up with 24hr fitness. It should have been done prior. Anyway, the rest of it will have to do on how good you are in squaring the club at impact (or at least your intended shape of shot). . . then you can start asking for more forgiving club if it's not happening.
My dad has been a Titleist guy for many years and has played with Titleist most of his career. He tells me to find what's best for me-- for my game. . . so I'm looking, too.