To your question: are these tools appropriate?, the answer is mostly no.
The gun you've linked is (as noted by others) a framing nailer. (It shoots long nails with relatively small heads.) You want a roofing nailer (short nails, big heads). I don't have any experience with the so-called combi tools, but in general, those sorts of things are a compromise.
The compressor is way too huge, unless you're thinking of painting your house. Maybe you're stuck on the idea of continuous cfm, which doesn't apply to nailers, but does apply to things like paint guns, sanders, or impact wrenches. Anything around 4-6 gallons will be adequate, with a bigger one offering more shots before it refills itself.
Get a 100' hose (or 2-50') and leave the compressor on the ground. (Some don't like to operate on an angle because they rely on oil lubricating the engine.) A slightly bigger hose (>1/4") will help with pressure drop.
Given the drop and potential injury, get a fall arrest kit (full body harness, rope grab, rope, anchor point) and learn what's involved in using it. Seriously. Even modestly sloped roofs have edges you can slip off.
Have your roofing materials boomed onto the roof. It costs more, but will save your back and be safer.