Yo, Riot, before Doing That Tank Update ...
... and introducing potentially eventually game breaking new tank items, could we adress Tank Karma first? I know she isn't overly problematic, but sure as hell unthematic and more than obnoxious to a fair share of players. And the more champions we can prevent from getting potentially broken the better! (We all remember tank Fizz, Ekko, Fiora.... right?) Additionally, I think this could be done quite easily, all while improving Karma!
Instead of doing this:
[RW] RENEWAL: Focused Resolve heals Karma for 20% (+ 1% per 100 AP) missing health upon being cast and once more upon rooting its target.
do something like this
[RW] RENEWAL: Focused Resolve heals Karma for 40/80/120/160 (+1 per 20AP) increased by 3% for every 1% health she is missing upon being cast and once more upon rooting its target.
This would
- remove her unnecessary hp-scaling
- retain her healing capabilities
- would still work mostly as an emergency/bait heal, due to being only a quarter effective on high hp.
- potentially make RW more insteresting for midlane&support Karma, thus balancing out the mantra options a bit more
Additionally I am convinced she would still work toplane, but, like, as a mage similar to
instead of a turqoise mini 
PS: My proposed values might be off, but a real game designer could easily adapt them. Try to focus on the general idea. PPS: I made a thread with more quick fixes to her, that should make Karma more interesting, fulfilling and deep, both as mage and support, without requiring a VGU or sth. You should CHECK IT OUT if you like my approach!