A robust criss cross of kindling at the top of the firebox for the "top-down" fire has always been the key for me to getting the Madison to run reliably. Gotta give it a lot of time... don't turn down the draft control (pull it out) until at least 450F on the stovetop a few inches in front of the flue pipe. I've had splits that were a bit underseasoned and they tend to snuff the flame out and make the secondaries die off, darkening the firebox. Eventually I open the door carefully (letting the smoke clear out so less smoke floods the house) and add more kindling on top, leaving the door cracked a minute or 2 to catch the kindling and let that keep the stove rolling until those splits are finally dry enough to burn on their own accord.
Lumber scraps (not pressure treated) work great for this kind of thing. Having some biobricks or other wood briquettes handy can help "muscle through" some not-so-dry wood (but the steam from that wood is still going to do a number on the secondary combustion and overall vigor of your fire).
Lumber scraps (not pressure treated) work great for this kind of thing. Having some biobricks or other wood briquettes handy can help "muscle through" some not-so-dry wood (but the steam from that wood is still going to do a number on the secondary combustion and overall vigor of your fire).