So, the question is this... how much charcoal do you use to start your minion method and how much unlit do you put in the bowl?
It only takes about 12-14 pieces to start the whole thing going. How much unlit depends on how long you want to cook. Some folks load it up and then cut of the oxygen to the cooker when they are done. This saves the remaining charcoal from burning. You need to have a cooker with good sealing qualities for this to work.
Not overload on smoke. I have 22.5 and thats bout what I use on minion which is chunks with charcoal on top. Minion is layer of coals, the chunks and more coals, but ifin it worked it worked. How was the end product?
Over the years I have narrowed it down to two basic loads for my 22.5" WSM:
Half ring with 1/2 a chimney of lit dumped on top for smokes of 8 hours or less.
Full ring with 1/2 a chimney of lit dumped on top for all other smokes.