Orijen and allergies? New formula

I'm trying to decide if I should try this new Orijen food for my cats. They are coming out with an Orijen Regional Red formula for cats.
My cats have pretty bad allergies and eosinophilic granuloma complex(EGC). They have been using Royal Canin hypoallergenic/ grain free rabbit because it's one of the few dry foods they can eat and will eat. Several refuse to eat canned so I need to keep dry food available although I also offer canned food daily. I've found a few other foods they can eat but they refused to eat it. I thought they might eat the new Orijen, because the regular Orijen was what they ate before I had to switch due to allergies. However I'm not sure if it's good because it has a lot of ingredients. I'm not completely sure of their food allergies because my vet said the food allergy tests are innacurate and very expensive so we haven't done them. Pretty sure poultry is one.
I couldn't find the ingredients online so I attached a photo from the brochure I got from the pet industry trade show I was at today. I was also impressed by Orijen's booth at the show as it was completely focused on cats! They called it the "Year of the Cat" which was nice to see since most food companies tend to focus more on the dog stuff.

If you're not sure what they's allergic to, I wouldn't risk feeding this food. The ingredient list is very long and contains several common allergens including several types of fish, peas, and beef. I also really hate spinach and cranberries in cat food, even in small amounts.

Dry and great imho is an oxymoron.... But Orijen for what it is, dry, is a very good food, imho.
My problem with feeding an allergic cat a regular food is the long ingredient list.
Royal canin Hp is about the worst food for a cat though.... If you read the ingredients, there is no meat in it.... It is pretty much vegetarian aside from the chicken fat used as a preservative.. ... So.... I would get out of that one for sure.
I would look for a food with a novelty protein and limited ingredients though.
But, having switched all of mine to raw, including a die hard kibble addict, I believe that given the time and work, any cat can be transitioned to wet only. And that's what I would do. It takes time, work, and a TON of patience, but I promise you it can be done.

Actually the Royal Canin I am feeding is not as bad as some of the formulas, it's the rabbit one. However I am trying to get them onto something better. Unfortunately the other dry foods I've tried so far that were limited ingredients/not common allergens, they refused to eat them.

This is the ingredients list of the one that I am using:

ROYAL CANIN Veterinary Diet feline GREEN PEAS & RABBIT FORMULA dry

Ground pea, rabbit meal, pea protein, coprah oil, rabbit, soya oil, natural flavors, calcium sulfate, anchovy oil (source of EPA/DHA), sodium bisulfate, monocalcium phosphate, DL-methionine, salt, taurine, Vitamins [DL-alpha tocopherol acetate (source of vitamin E), inositol, niacin supplement, L-ascorbyl-2-polyphosphate (source of vitamin C), D-calcium pantothenate, biotin, pyridoxine hydrochloride (vitamin B6), riboflavin supplement (vitamin B2), thiamine mononitrate (vitamin B1), vitamin A acetate, folic acid, vitamin B12 supplement, vitamin D3 supplement], choline chloride, Trace Minerals [zinc proteinate, zinc oxide, ferrous sulfate, manganese proteinate, copper proteinate, copper sulfate, manganous oxide, calcium iodate, sodium selenite], rosemary extract, preserved with natural mixed tocopherols (source of vitamin E) and citric acid.