Hi @Mankybus, welcome to the community. 
There was another thread recently where someone had set up a GTK theme that was not being acknowledged by Qt apps in Cinnamon. I wonder if your cursor issue is a similar issue (GTK vs Qt theming)?
If so, you could try your hand at the solution in the linked thread, or a more straightforward method would be to use a theme engine like Kvantum to get Qt apps to accept your GTK theme.
The basic idea is you would add the Nordzy theme to Kvantum, and then set your Qt theme to Kvantum.