Just to answer that question, there could be any number of reasons: Takes special tools\medicine to prepare for (like Chouji's special family soldier pills) which she didn't have on hand, or it could require more time than was plausible in that battle (that was pretty darned fast-paced; if she needed to concentrate her maximum chakra for something, she'd have been dead before she could use it), or it could have been a poor environment for it (they were fighting in a desert cave, and she needed water\trees\etc. present to manipulate), or simply it just have not been the right technique to use against that guy (battling a puppetmaster, is it a wise idea to, say, employ genjutsu when you aren't entirely sure if the person you're fighting is a real person or a puppet?), or she has some very powerful techniques she doesn't feel comfortable using because she has little\no experience with them and\or they were unreliable at her contemporary experience with them. Naruto didn't summon toads in a battle with the illusory Itachi, recall, even though we know he had talent with the technique and they were a valuable asset against an extremely dangerous opponent. There was a reason for that, too, even though the toads have proven to be the key to some of his more powerful techniques.
Edited by desaix, 19 April 2012 - 09:11 PM.