If by "half and half" you mean, two different levels of points? Then yeah probably. If I had to ballpark I'd say somewhere around 1500 and 3500 for the two milestones.

3500 is typical.  Always split.

1500 for 5 and 3500 for 15 is a good baseline guess. I'm inclined to think it might be a little harder because of this fusion but the point requirements thus far have been really nice. 

Shards are my weakness.  I can just about squeeze those numbers out.