They just need to buff her base healing. Something like reducing the illusions healing from every 1.6s-->1s would make a huge difference, and would help make her other talents viable.
With Life-Like it worked similar. If I remember right they nerfed it at some point cause the healing was too strong but it was still okay.
nerfed it to 70% and heal every 1.2 sec, and then nerfed it again to 1.6