Wheat LME is anywhere from 50:50 to high percentages of barley malt based so adding a little bit more malt is not going to affect much. Check out the LME production site and it will tell you the ratio of wheat to barley in the LME you are using. When I make my starters I crash cool and decant, then i make a final step in my starter with similar wort to the beer I'm brewing and use that and pitch at high krasuen. I do this more for hops and color content (and cos I'm crazy) than worrying about wheat/barley ratio of LME.
Clem