North: I highly doubt that they'd get higher than #6, the last time North was really good was when k0nfig was hard carrying them. This lineup is just a moderate upgrade from their current lineup, not enough to get into the top 5 or even 3.
Optic: I have my doubts that they'd get into the top 10, not the way k0nfig and kjaerbye are playing right now. The potential is there though.
Heroic: That lineup is not gonna top 20 as of now. Vitality has more talent and more experienced players and they're not top 20 either, so I doubt that this would work, unless BlameF turns out to be even better than ZywOo.
In conclusion, the Danish scene has a lot of talent, but you're being very optimistic with your placings, especially since supposed star players like k0nfig kjaerbye and JUGi aren't playing as well as they could, and guys like BlameF have yet to proove themselves. Besides that, there are quite a few teams in a slump now or they could make roster changes aswell.
Btw I'd have made the lineups as following (without Astralis):
Heroic: Same as yours