I feel like Rework Karma should be able to absorb enengy from skills used to charge up her mantra...

She should be about balancing energy from ememy actions such as skillshots, dashes and so forth.

Passive: Karma can absorb some energy from skill shots/ dashes/blinks that pass near her. Once she absorbs that energy, she needs to balance it out, hence her name Karma. That energy allows her to power up her abilites based on the energy she absorbed.

This would replace her ult, allowing her to get a new exciting ult along with some fresh basic abilities.