If you are concerned about the physical efforts and you play the Alto, I would transpose those oboe parts for alto (or clarinet - but I don't know what are your requirements). The tenor feels more open and airy but then one needs a bit more air (and lungs power). All in all, I find the Alto the best compromise and the more comfortable (weight, air pressure, air volume, mouthpiece size etc.)
Two problems there: first, I don't have an alto. Second, transposing the oboe part to alto would mean a lot of altissimo. I suppose both of these problems could be fixed.