It's been a slow process with my original team plan (PSSSS). My toons were all woefully under geared (tank had dungeon blues), so my first venture into ramps was hilariously short lived after the first 3 guards made short work of my tank and the poor shammies folded. I ended up buying a bunch of AH outland greens as well - doubling his hp and massively upgrading his defense. This let me farm ramps up through the 2nd boss with relative ease (~48 minutes per run at the start).

Did Ramps until 61, then moved onto BF until 63. No major issues there.

At 63 I moved to SP, where I have lived since doing a mix of short clears (~80-90k/hr) up to the first boss (not killing him) and also full clears when I get bored of that (~75k/hr). I'm still here at 67.