On the other hand, don‘t push yourself so hard that you injure yourself and then have to take time off to recover.
Its sounds like your cardio and conditioning is great. Maintain it but don‘t go over-board.
If you can do 2.4 kms in 12 minutes, or better in 10 minutes or less, your pace for that distance is great. For 6 kms, you pace will be slower. You may want to train for the 10 km races and that info is on the net.
The danger is pushing yourself too hard. Running is a great exercise but avoid risking foot or muscle injuries then have to carry it into BMQ. Just be careful.
Im no expert, but training for endurance and speed together is better than than only one. In BMQ, SQ, and in the field, your activites require strength and endurance. The obstacle course stresses the body differently than a straight 6 knm run which is different from a 15 km ruck mark in 2 hours 26 minutes.
I‘d mix wind sprints/interval training to build VO2 and strength and mix in a one longer run for mucle conditioning per week.
If your running is good, loose a running session or two a week and try mixing a weight routine and build more power for the arms, upper back, lower back and shoulders. Lugging a ruck 15 kms not only puts you in a cardio range, but you need the strength to support heavy loads.