I am suprised not many people play karma

Just look at her numbers, and there is some crazy shit you can do.

Say you have 650 AP, are level 18, and have max CDR.

The total damage on R-Q at max rank is 785 (+975) magic damage, in an AOE, with a 50% slow attatched.

Or you can use R-W, which deals 260 (+ 585) magic damage to one guy, rooting the guy for 3.25 seconds, and healing her for 20(+7)% of her missing HP twice.

Then we have R-E. Not as appealing as the others, but if you have a hypercarry, shielding them for 410 (+ 520) health, along with a 60% speed buff, could help you in teamfights a bit.

Your ultimate itself is key, but with 40% cdr, that is on a 21.6 second cooldown. At this point, thanks to your passive, each spell hit reduces your ult cooldown by 3 seconds, and each auto reduces it by 1.5. Say you hit them with 1 W and 2 Q's after you burn your ulti. The W hits 3 times, and brings it down to 12.6, and the 2 Q's bring it to 6 seconds.

Oh, and that is if you are fighting one guy. Say you are in a teamfight, and you land your full R-Q on all 5 somehow. Your passive procs per target hit. This means that the initial damage brings it down to 6.6 seconds. The secondary hit will refresh the spell.

More realistically, if you land it on their frontline, maybe 3 champs, your full R-Q will bring your mantra down to a 3.6 second cooldown.

Tl;dr: If Karma becomes FOTM we are fucked until Galio-senpai saves us all.