Elemental affinity is just about the only useful thing for class items. Once you've got all four different elements there really isn't a reason to save any other ones besides sentimental reasons.
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I’ve got an artifice bond of each type. Never need another bond ever
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Yup. Grinded master dungeon for that too. All elements. Now it just needs levels in the next dlc. And ornaments 🥳
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Only exception would be the raid armor pieces, because they have a raid-specific mod slot