x2. Although I have only used Kingsford so far, just because I bought a ton of it on sale, lump will work fine. I usually do the minion method, with an empty coffee can in the middle where I dump the lit chimney full. I then add the wood chunks, the meat, set the probes and close it up asap. The quicker you close it, the less you risk over shooting. As I'm waiting for the chimney brickets to get to ready - about ~20 to 25 minutes, I get the DX2, Maverick, and probes all ready, so it's a bang, bang assembly.
When I close it up, the top vent goes wide open, the two lower vents get closed, and the DX2 takes over. Do note that when you first turn on the DX2, the fan will not operate for a couple of minutes, even as the probes report less than dialed pit temps, so don't get alarmed. As I get to around 10 degree below pit temp, I'll close the top vent to 1/2 open. I will then set the maverick to monitor the pit temp, with alarms at +/- 10 degrees, and obviously the food temp at the appropriate set point. Then it's all DX2. For longer cooks, after the 12 hour mark, I'll peak in the door and see how much of the charcoal is used, and if needed, I'll just toss in a a couple of handfuls of unlit brickettes. Also, from time to time, I'll take a soft rubber mallet and tap the lower to help dislodge the ash and let it fall.
Just read the manual quick to familiarize yourself. I will mention that I've not bothered using the end temp ramp, but that functionality does exist.