I would say that the goal should be to learn from the Gemara and Rishonim upwards- ie/ if doing aveilut, start with Moed Katan, if learning kashrut, start with Chullin, etc. This is the approach which I believe the Rabbanut uses. I am familiar with the derech halimud of the Institute for Traditional Judaism in Teaneck. They learn Perakim Gid haNasheh v' Kol haBasar from Masechet Chullin, Issur v' Heter (Melicha, Basar v'Chalav, Taaruvot) from the Gemara, Rishonim, Shulchan Aruch, and Nosei Keilim, and with special emphasis on the Tur and Torat HaBayit of the Rashba. Niddah is learned from the Rishonim and Masekhet Niddah, with the Baalei haNefesh of the Raavad, Torat haBayit of the Rashba, Tur, Shulchan Aruch, and Nosei Keilim. Hilkhot Shabbat is learned from Shulchan Aruch, Chayyei Adam, Mishnah Berurah, and Shemirat Shabbat keHilkhata. Hilkhot Geirut is learned from the Gemara, Shulchan Aruch, Nosei Keilim, and with an emphasis on the teshuvot of Reb Moshe, Melamed LeHoil, Rambam, and R' Benzion Uziel, and the remainder of Orach Chaim is learned with Mishnah Berurah and Aruch haShulchan (seder hayom, tefilla, chagim, taaniyot, etc.) See here: http://www.themetivta.org/curriculum