Need Help Bettering Odds with Support Morgana

I main support {{champion:25}} more than anything else. The issue I am having is that I only do good about 50% of the time. I can either be really amazing and 1v1 a 5-0 {{champion:11}}, or I just fail. I rush {{item:3157}} and follow up stuff like {{item:3089}} and{{item:3151}} (i like to be able to hold my own but help out as well) Is there anything I can do to better my odds?
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