Just the Two of Us: 1550

My experience is that for a "casual" 2v2 team you will get from 0-1100 rather quick, compared to 1100-1550 as it then gets much more challenging. Just a heads up to those wonder how easy this is, it's not impossible but for most casuals (not good class combination) getting to 1550 will feel like getting past 3000 rating! :D

Not a very hard achievement to get. Any dps/dps or healer/dps comp could get this achievement if they play their class decently. You may find yourself stuck at around 1450-1500; it starts to get much harder to gain rating at this time. Don't be discouraged however, as long as you keep a 50%-60% win percentage you should be able to get to 1550 :).

For casuals it's not that easy.
I'm stuck at 1,2k with 50-50 win to lose ratio. Whenever I earn some rating towards 1300, I lose a bit, and I might end up below 1200... :|