So, about that subject...
The subject will most closely resemble a silhouette, as the background will likely be washed out and very bright. So, your subject will need to be really dynamic, really eye catching, as you can't rely on many other usual techniques to make them stand out. So, play around with techniques specific to silhouettes.
That hazing we mentioned earlier comes in handy here: by position the actual flare over the subject, you can have a well backlit subject with some added visual interest, compliments of those coloured shapes.
If the flare overwhelms your subject, then try eclipsing the flare by having it partially covered by another object. For instance, having the lens flare peak over a corner of the subject is a great way to add a little drama to the picture.
Remember that with such a touchy technique, experimentation is best. Look around to see what other people have come up with. Play around with those weird angles, try positioning that lens flare all over the composition, seek out a variety of settings and subjects!