Sorry you been through all that. Bad emotional traumas lead to self sabotage, cravings and poor diet which ultimately leads to organ and gland dysfunction, so it shouldn't be any surprise you're in the condition you're in.
Juice fasting worked very fast for me in healing my Toxic Hunger symptoms. A green smoothie fast should work too if one doesn't have a juicer, but does have a blender. If one feels that they can't juice or blend fast right now for whatever reason, eating 80-10-10 should still do the trick as Dr. Joel Fuhrman says. The 811 diet I'm doing is more like Macrobiotic/McDougall vs. the Doug Graham mostly fruits on greens.
When I was juice fasting and started experiencing cravings, I used the FasterEFT technique to tap on the cravings and it really helped them subside quickly.
Advice on what veggies to use, in my experience I think the most important is to not combine too many together at one time. For veggie juice, I'd recommend only combining about 2-3 veggies at a time with out of that, a max of only two greens together. Otherwise add any one or two veggies like carrots, beets, cabbage, celery, cucumber together with one or two greens max like kale, collards, chard, spinach, romaine lettuce, etc. Adding a small apple and fresh squeezed lemon juice should be fine.
For green smoothie, I recommend combining no more than two greens together and no more than three different fruits to the mix for a max total of 5. Green smoothies may not be the best for people with leaky gut and/or candida because of the relatively rougher fiber from the greens and too much fruit sugar.
For your leaky gut, when coming off your juice fast and starting the 811 diet, I agree with Anthony and stay away from grains for awhile and replace with potatoes and squashes. Cook most if not all your foods for awhile so easier on your digestion. Oriental and Ayurvedic medicine recommends this.
Most of your allergies, if not all, should heal as your leaky gut and digestion heals. If your allergies are still quite troublesome, maybe seek out a NAET practitioner to speed up the healing.
Start doing the FasterEFT ASAP though. That's going to help you immensely throughout all this.