Look, I understand HBD. I answer questions pretty much daily on it. And, when someone says "You MUST....", I call bullshit in HBD. So, when someone says "You MUST....." in HD, I'm somewhat skeptical. Obviously everyone would love to have 80s across the board. Well, that's not going to happen. So you have to find other ways. If there's only one way to win, the game is stupid and not worth anyone's time.
Now, after your "You MUST......" statement, benis has shown you several examples of users who've won without superior ATH/DEF. And, after every one, you've said "Yeah, but....."
There are plenty of folks willing to offer advice. I generally pass on the "You MUST...." folks. But thanks anyway.