Those who don't never seen her full AP...
Hurts like a Bitch...
Sp4zie would like to have a word with you.
Getting rod of ages, gunblade, CDR boots, spirit visage, frozen heart, and one other tank item, and the become impossible to kill, and still do 500 damage per Q
The thing I hate most about Karma, is that if you pop the shield she keeps the mobility. Unless you have hard CC you can't even force her into an extended engagement, and even then she just uses her tether. Due to the nature of her kit she has everything a support mage could want.
Karma has a ton of harassing power and the ability to hard engage 1 on 1 after enough Q's it's as simple as E W R Q. Unless The Karma has been taking a ton of harass (which her shield should prevent) you can't really fight back or get away unless you have crazy mobility or burn flash.
The icing on the cake? Karma has relatively low costs and support mana regen (an extra 2 mana back every 5 seconds). Assuming you can fight her or harass back she can still out sustain you.
It makes me chuckle, yeah. She's been a solid pick for a long while.