It would defeat the purpose. The beauty of SSILD is that you can do a few simple cycles and go back to sleep, then you may get a DILD, and FA, or in the worst case wake up with your mind/body prepped for easy WILD entry. With FILD though you will be constantly going back and forth between sleep and wake. And the physical movements will ruin those subtle awakenings which can be utilized to enter a dream state rapidly.

Having said that, each person is different and SSILD is by no means perfect. Therefore I encourage you do try it yourself. Who knows? Some wonderful things might just happen :)