Oh yeah I forgot I even have Lux. I should play her again.
Karma is way more of an upclose mage personally. I'd rather guarantee RQ by rooting first. I love bullying lanes with her though she feels pretty lackluster in teamfights.
Nah, her playstyle isn't that up close and personal even though she can be played that way in top lane for instance. Regardless, with CDR (like Unholy Grail) the cooldown on her mantra is low enough to just throw out an Empowered Q at 'random' when sieging the map while your team patiently waits, and have it change the outcome entirely if you land a good one (similar to a Nidalee spear).
Furthermore, her teamfight potential is some of the greatest in the game right now. Especially if a fight drags out. Her mana consumption is low to the point of being able to spam away for minutes on end, cooldowns (mantra included) are very short with her preferred items, high damage with her Q, a snare to peel for whoever is important, and the possibility to whip out an amped-up Shurelya's + Locket AoE shield which
could deal damage too. The only thing she's really lacking is a way to cancel channels; personally I'd like to a see a short duration silence akin to Viktor's or Blitzcrank's on Empowered W, but it's a debate in itself whether current Karma even
needs buffs in the first place. Which she doesn't, just so we're clear.
You should give her another honest try if she's your cup of tea. People criminally underestimate her despite her kit blending in very well with how the game has been played for the past few months (never mind certain popular picks) and you'll also automatically start out with a slight advantage in most match-ups due to the likelihood of the enemy being quite unfamiliar with the extent of her ability.