Which path should I take for my fictional Heroine?

Kristen is able to control water at the molecular level and up to 1000 tons quantity. She is also able to change water into any of its phases, and she can shapeshift into any phase of water.

After she absorbs her mother's soul (willingly) she gains increased mental resistance to telepathic attacks and anti-magic attacks, and eventually learns to control gravity and manipulate magical gateways to other places in the Universe and other Magical Planes.

My question: Should I give Kristen access to Lightning, Fire, and Earth abilities her mother had, or just leave it at the Water and Gravity abilities?

Kristen is supposed to become "Elementalist Superior" at some point in the story.

Just leave it at Water and Gravity
Give her all of the abilities
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Which path should I take for my fictional Heroine?
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