When to play the "Phantom Liberty" DLC?

[dashavingo]

I've done one play-through with this game. I'm loving it in its latest ultra-patched version. But I'm curious, what would y'all suggest is the best time to initiate/pursue the DLC? (Phantom...). I'm level 11, but it appears you can start this DLC quest line at any time.

All input appreciated!

Thanks,

d.