If Zyra did not exist and if Karma were to be released today:
Heavenly Wave and Soul Shield and their Mantra'd effects remain the same.
Replace Spirit Bond with Mantra and have it give CDR and with the same recharge time as Zyra's.
Replace passive (or not) and ultimate with new ones.
Karma is now better.
Although, I'll have to admit that I'll miss old Karma, she was the only champion that was capable of heavily manipulating the HP stat, and if you've never noticed this. --- The statement below is false. The statement above is true.