Ok so first of all, I buy a big chicken, and it's between two adults and two primary aged children not 3 rugby playing growth spurting teenagers who could strip a carcass in seconds. I think the latter makes magic chickening more difficult! Secondly, pretty much everyone playing the magic chicken game makes stock and counts this, and thirdly people tend to be using the scraps for meat flavoured meals more than meat meals if that makes sense? And often lighter lunch meals. I'm not going to get eight or nine roast dinners from one bird but if I use the stock and scrappy bits for a big pan of soup, that's four already.
I'd divvy it up into a few types of meal with each bit of the bird. Some meals are in more than one section. You could also do a really chicken heavy noodle dish or a veg noodle dish with a bit of chicken in.
Main bits of the chicken- roast, curry, chicken heavy pie or pasty, chicken salad
Scrappy bits you pick off from the carcass- soup, noodles, pasta, egg and chicken fried rice
Stock- soup, risotto. There are about a zillion soup recipes involving chicken stock so you could do a different one every week for months before repeating. I do also use stock cubes and find them useful, they just do different jobs. Risotto with stock cubes only is a bit grim, sorry, but equally I might use a stock cube where I wouldn't bother with proper stock.
Also if you get fed up a lot of the magic chicken dishes can freeze.