Coming from 10m point of view (8/14hc, some 10-20% wipes on malkorok), I'd just suggest to progress in order. The first 4 are quite simple and easy(ish), galakras isn't very bad either, a bit of a gear & skill check. Juggernaut is more or less a cake if you got the DPS when "outranging" the siege phase. Shamans are the first a bit more challenging one, depending on your strategy and raid comp but nothing too bad if you're able to 3 tank it. Nazgrim is all about just killing adds and staying alive, malkorok isn't anything but a quite simple gear & skillcheck (which is something our comp has to improve, people dying to simple mistakes).
Short story: Go for the bosses in order to keep it simple.