Don't play Orianna Support. The problem is that her CC is on her W and Ult, her most mana consuming abilities. This means that in order to slow or speed up a champion, you must spend a lot of mana, right? Well that's not all. In order to move the ball you must spend mana for that as well. So the cost of her Q is added to cost of her W, meaning if you don't deal damage with both you are wasting mana, which is not a luxury supports have. At that point you are better off maxing her shield, which means you would have been better off picking Karma. Actually, DO pick Karma. She has a very active get engaged play style that requires her to run up and fight people while also protecting her allies. Each of her abilities are independently useful, and her ult lets you buff the tools for the job.
I'd say
and
are both able to go ham when needed while being capable of babysitting if your lane is losing.