[darkshark]

Lens flare is pretty awful. You might have better luck if you change the lens type to the 3rd option (don't have AE open right now, I forget what size lens it is).

Try this:

Delete your lens flare.

Create a new solid, black.

Apply two or 3 lens flares to this solid, all of them the third option for lens type.

Right click on your black solid and change it's blending mode to screen.

Arrange the flares to the left side, center, and right side of your text shatter.

apply a gaussian or box blur to the solid layer with the flares on it.

animate the flare brightness to start on the frame it shatters.

animate the flare brightness to fade out as the brightness of the shatter fades as well.

You might want to create a long rectangular mask over your flare solid, the length of your text, and feather it out so that your lens flare brightness is kind of centralized over your text instead of being global.

I think that would give you a really, really nice effect.