1Fill a large heavy-bottomed pot fitted with a deep-frying thermometer with 3 inches of oil (1/2 olive, 1/2 canola) and heat to 375°F over medium heat.
2Meanwhile, dry drained chickpeas thoroughly with paper towels. Combine 2 tablespoons of the flour, the salt, and the paprika in a large bowl and briefly whisk to break up any lumps. Add chickpeas and toss to coat. Line a baking sheet with paper towels and set aside.
3Working in two batches, fry chickpeas until they stop popping and have turned golden brown, about 3 to 4 minutes per batch. (Be careful: A lot of commotion and steam erupts from the oil when the chickpeas first drop.) Remove with a skimmer or a frying basket to the paper-towel-lined baking sheet.
4Combine remaining 1 tablespoon flour and sage leaves in a small bowl, toss to lightly coat, and tap off excess flour. Working in two batches, fry sage in oil until leaves stop foaming, about 10 to 15 seconds. Remove with a skimmer or a frying basket to the paper-towel-lined baking sheet.
5Toss together chickpeas and sage in a bowl and serve immediately.