If you don't mind i'lll post my tips and shizz. I don't play Ibuki, but my friend does so I have some knowledge on her.
1. Neck breaker is -13 on block so your opponent has a lot of time to punish it so don't throw it out randomly.
2. Use Ibuki's crazy mixups, its the strongest part of her game.
3. J. lk is a brilliant cross up, use it more.
4. Make use of her awesome damaging anti air (Its as good as Juri's)
5. You can use sazan at mid range & if it hits you can link cr lo or st st. lp after it (if you meaty it. A meaty is when you hit an attack in its last active frames leaving you with a larger frame advantage if you didn't know)