Bear with me on this, but Karma seriously needs a nerf.

Karma is overall way too strong, and here's why.

Problem 1: Mantra+Q damage, at any level, does a minimum of 40% of your health, and caps at about 85% Lategame. This has been the biggest problem with karma since she had this. The damage is unjustified and broken especially for a Mage that focuses on other stats and not just full AP. At level 1, karma can do between 150 and 250 damage to you with her Q depending on your MR, and to other mages and supports like her, that about 46% of their health. Midgame, it falls at about 550-750, and Lategame, it's about 900-1550, usually being above 1000 since people build more armor than MR right now. The CD caps at about 8-9 seconds early game, and Lategame it falls to a minimum of 3-5 seconds. And you thought Karma was balanced.

Problem 2: Mantra+W Root duration. It's 3.25 seconds, passing Morganas Q, which was thought to be the longest until you read this. Without mantra it's less, but with mantra, ITS 3.25 SECONDS. You read right, 3.25. (By then, her Q is back up for the broken damage) aside from the ridiculous scaling and hidden power this ability has, this root duration is mindblowingly stupid, the longest movement cancel in the game.

Problem 3: The BS heal from mantra and W. Let me just say, what was riot thinking? She never has to leave lane since she can regenerate 40% of her missing health whenever her mantra is back up (which is a very short CD) and, even at low levels like 1 through 5, she can still regen 200-400 health max with a single ability. And if this wasn't op enough, it has an AP scaling of 1%. This might seem bad, but with two ticks, she can eventually gain about 14% of her health as bonus healing, considering they don't take a full AP build (which would be like 24%).

Problem 4: The scaling on her W. Enough said for that one.

Problem 5: Lastly, she can give her entire team a ridiculous boost of movement speed and a very heavily scaling shield, even with a good base shield too. This is broken during fights that have more than two people involved, (even op then), and is honestly too powerful.

Now that you've seen my reasons, I hope some people realize the hidden overpowering in karma and why she's so op.