Who do I want?
In the words of one of my former instructors at the forestry school: it depends.
Some of it will be who is there at 13 and then who the Sabres will lean toward at 13. Personally, for forwards, I've been smitten with Leonard for a long time but I don't see him lasting. Same with Reinbacher on defense. Something weird could happen and either could be there (hell, something massively odd could happen and BOTH are there at 13) but I don't expect it.
Axel Sandin Pellikka is very good vs. his age group and has played pro. He's a transition guy and has a lot of the "good Montour" to his game when he's on. And the "bad Montour" when he's off it. He would be pushing up into a lineup that already has two good options for PP deployment and his skills might be under-utilized. And it might be that they need someone like that down the line too - weird things happen.
I like Simashev more than the services have him rated. I could see Gulyayev if they want to just watch the world burn by taking an up-tempo offense-man who is constantly attacking with his speed - really, the guy has one speed and it is Nnnnnnuuuuuuuummmmmmm! I really like Willander but can't see my way to them taking him at 13 but I expect he's gone by 39. I'm not partial to Dragicevic.
Barlow and Ritchie... eh. It's the Curb shrugging gif. I guess. I'm not particularly in love with either one - I can see Barlow being an early maturing player like Rossi and Ritchie is just kind of meh. I try not to be put off by draft prospects (I know I said Dragicevic above, I would add Cristall to the "please no" list too and probably Heidt).