Yeah you could do a combo of DILD/WBTB, but once I'm up for the WBTB I find it best to focus almost entirely on the lucid dream to come and what I will do once I get lucid, and I WILL! Having this mindset is very important and is like MILD. When I get back to bed I keep on visualizing and do my mantras. This will increase your chances of getting lucid alot compared to just staying up and relying on DILD.

Everyone should practice DILD in some form. It's all about awareness really but it takes a while to get into the habit of questioning your reality. MILD is more of a short cut, power boost just before you fall asleep. So combining them is the best imo