Heres how to buff karma, doing riots work for them basically... here ya go.

All they have to do is give her 1 more mantra charge. make it so you cant mantra charge the same ability within 4-10 seconds. MAYBE put a delay between immediate uses of R...(I hope not but riot hates giving champions that aren't flashy bullshit power we all know this)

and then give her E more damage on matra charge.

AND finally. Make her W break tether point much farther away than it is now. Cast range is fine, Break range is pitiful.