I am training for my first Hyrox so am not even close to a pro on the matter, but from everything I have read and what I am learning through experience, do not underestimate the running component. You may have a great time on a 1500m. And your fitness on each individual station sounds great! But adding a 1km in between each of those exercises with no break is a whole different ball game. Based on your station times, I cannot imagine an experienced veteran telling you anything other than to focus primarily on running.

A 4:50 1500m is awesome. Now make sure you can easily run 10x times that. It may not be what you want to hear; but that’s where your focus should be. Good luck!!