Embarked in a new zone (do that a lot, I'm picky) with magma, underground river, brook, flux, and somewhere in the neighborhood of 45 z-levels, most of them granite. Unfortunately my dwarves went through the food pretty fast, and the caravan was hit by that nasty bug where they walk... very... slooooowly... so the caravan never traded.
Now, a little background. Since this is Dig Deeper 1.4 I set up a drowning trap immediately. Basically, the entrance ramp to my fort goes below the brook, and when I toggle two levers it seals both exits and opens a 5 tile wide flood path (later I plan to upgrade that path with pumps to speed drowning). A second lever activates a series of pumps which pump the water out (later I plan to massively expand the pump array so it can be flooded and drained at incredible speeds for handling multiple squads efficiently). It's easy to set up, requires only basic knowledge of hydromechanics, and allows 7 dwarves to take down entire armies. Useful for when the orcs siege constantly and keep you from getting migrants.
With the food nearing the danger point and the only soil on the opposite side of the map, I decided to pull the flood lever without engaging the seal doors. It was at this point I realized two things. First, dwarves are kind of stupid. The water, while not blindingly fast, filled the chamber inside of a minute or so, and it took them 30 seconds to pull the lever. The second thing is, my drainage array pump requires 15 more power than the current system provides. So now I'm flooded in, with dwindling food supplies. First time I've flooded my fort, it's fun.
On the positive side, once I get out and can get at the copper on the map, I'm set up to start making bismuth bronze. I'll have to wait for haulers to go after the dolomite, since it's so far away, to make steel. There are two or three exposed hematite veins, and I have magma. Going to need coal or more wood to make it though, bismuth bronze will have to do for now. There's also some gold and mithril, so I can either make mithril or deep steel armor long term, until I hit the HFS.