Idea for Karma's Mantra+W
The main theme of Karma is duality, choice, ability to harm enemies or to help allies. What if Mantra+W could be cast on allied champions with the effect of balancing % hp between Karma and her ally every tick? This means that damage taken by Karma or her bound ally would split depending on beefiness of both (with a typical AP/HP Karma build this means she will be able to save a squishy from a short burst, or she could transfer some burst damage directed at her to a more tanky ally champion). It could also be limited to the cases where Karma's ally is more wounded. Without this kind of restriction it's more versatile, but opens some ally-hurting decision (is it bad though? We already have Kench). While it's a save mechanic, it promotes a choice between Mantra-E and Mantra-W for defense. Some number tweaking on her shield will probably be needed, but for now I'm talking about a concept.