You definitely have some good ideas, which sound great.
My advice is this:
Go through the motions and figure out if your organ systems are functioning and properly clean. You may have allergies because something such as your liver or bowels are indeed still loaded with toxins. Those are, in my opinion, easier cleanses too.
Secondly, I worked for a chiropractor once that did a treatment for all kinds of allergies, you would be surprised! It really did work! I would ask clients all the time wether it was working and you would be amazed at some of the miracles that did happen. One story was about a little girl who was so allergic to dust that she couldn't even jump on a trampoline. She was completely healed. As we're people with psylliac disease (gluten intolerance) as well as many other ails.
It is called NAET.
N, I don't know what that is but the rest stands for Allergy Elimination Technique.
Good luck