I played anivia before. I didn't like her as a support since he needs a lot of item to be competitive and as we know supports lack in gold. Good supports are those that does not need a lot of items, ex tanks like alistar and malphite, or utilities, like lulu and janna. For ap supports, Karma and lux due to their high base damage and range.

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https://steemit.com/philippines/@kmelvin256/unbench-the-kench-a-tahm-kench-top-in-depth-guide-part-1-basics