Also Chaos Magic technically include Energy Manipulation(because she need it to channel it first with her natural genetic power), Probability Manipulation(small/medium scale) and Reality Warping(large scale).
As for main power as in what she uses most frequently, that would be probability manipulation, yet that is the result of chaos magic.
The better term for "magic" would probably be Witchcraft, AKA the spells and knowledge she learnt from Agatha.