Force Field is not a particularly solo friendly set in the low levels, it gets better at 20 for corrs, but even then it’s not amazing solo.
dispersion bubble doesn’t keep away foes, but it does give you defense and some mez protection. The defense it provides is really key for soloing.
You’ll want to look at Force Bomb as well, it does guaranteed knock down and -resist in an AoE, so it helps defensively and offensively.