I would prefer that you did Tempo Runs, or GPP for the 30 minutes.... GPP can be weighted or unweighted. You can structure your GPP to bring up weak areas without toasting your CNS for tough SAQ / Weight workouts.
Dave Tate (elitefts), Coach Davies (renegaetraining), Zach Even-Esh, Charlie Francis and many more are good references for this in terms of free articles covering the topic.
The idea is to know your weaknesses well enough so you can adress them using the repetition method(strength endurance), or a concentric only means (sled dragging, etc), so you don't kill the muscles or CNS, but rather flush them with blood while raising work capacity....
All forms of GPP / tempos can be done while keeping your heartrate at or above the 'aerobic threshhold', so simply jogging may be robbing yourself of valuable training time since the carryover may not be optimal.... well hell, isn't optimal.
I hope this helps.