You asked a while ago if anyone knew of a V8 juice recipe. I have been browsing various sites for juices, etc. and found this. I’m not sure if it will work for you, but might be worth trying, if only to use as a base as you develop a combination that you like:
2 tomatoes
2 celery stalks
½ cucumber
½ zucchini
1 stalk broccoli
1 large carrot
2 cups kale or other green leafy vegetable
Salt and pepper
Options:
Chilli pepper / Cayenne