DILD seems a good one to pick, especially as I've done it a few times. Refining skills is always fun, and I can't really stop my DILD if I'm aiming for LD's.
I'd like to try MILD and Dream Yoga at the same time as well, but I'm not completely sure about either one. MILD seems to link very well with DILD and Dream Yoga, but WILD'ing seems fun too.
Help?