I don't make it a hard rule per se ,but let's just say the 6ft4+ guy better come in with his skating pretty much in the bag if I'm picking him. That's the absolute minimum.
He's actually a strong skater not very skilled though. He's already used on the pk in Liiga at 17 because of his reach & length. He's physical too.
You draft him because you think he can become a 4th line, physical center, who can pk. Basically, an NHL version of McCarron.
If he was skilled, he'd be ranked a lot higher.
He'll get taken early because someone doesn't want to lose out on the potential next Lowry or Boyle type.
I would start to consider him with Chicago's pick. Wouldn't be surprised if he goes late 2nd, or frankly, 5th round. Hard to know.