Nice one mate, great help having defined goals.
From a sports science point of view I'd do a power and strength split and keep up the jogging. Strength is usually 4-6 reps in a set and power 1-3. Pure strength could be 5 sets of 5 reps with heavy weight of the big lifts: deadlift, squat, overhead press or bench press and also weighted chin ups for low reps. For leg power: box jumps, sprints, sled push/pulls and explosive squats etc and power cleans seem to transfer well over to trials. Jogging everyday is pretty safe if you keep the intensity down and do it a good while after lifting on gym days (6+ hours). Hill repeats and longer sprints will be a beast for leg power endurance but that might be time better spent actually riding trials.
Second what everyone else says about diet, neck as much protein as possible, and just riding. Best way to get good and something is to do it.
Also bodyweight exercises can get good results and can be pretty fun if you have the time to put in learning skills. Most top gymnasts haven't seriously touched a barbell and are pretty jacked, check out Yuri van Gelder
Hope that helps mate and good luck on the comps!
Sam