Former Army Officer, 10 years, Infantry and MI. I was commissioned in '97, while my experience is dated, some basic things hold true.
I'm focusing my advice based on your goal of going to Ranger school.
Drop your weight lifting to maintenance level. Stick to big lifts so you don't lose any strength. 5/3/1 BBB would be good for this.
Focus your efforts on rucking, running and bodyweight work.
If you want to go to Ranger school you need to be able to hump. Used to be 12 miles in 3 hours for 0 Week, my year they changed it to 16 in 4 hours. Six months seems like a long time, but if you've never rucked before, you will need a long time for your body to adapt.
You need to be able to do 49 pushups, 59 situps and 6 chinups. Looks like you are right on the bottom edge in terms of numbers, you do not want to be there. You want to have a buffer in case you have a bad day or a hard grader.
5 mile run- under 40 min. Dropping 5 min is hard. You're only running 3 days a week and only 1 long run. That's not enough.
There are also obstacle courses and other endurance events. You need to train for these. Remember, the PT test, 5 mile run and 12 mile roadmarch just get you in, then you have to be in shape for the actual training. This is all endurance based assessments.