Ok, I know this is a bit weird. One majorly broken exotic, Gemini jester, and a somewhat rarely used exotic, knucklehead radar. Let radar be a counter to jester. Ok not like completely negate the perk, but lessen the impact. For instance half the debuff time. It will encourage Hunter on Hunter action. Rather than be utterly blind in combat.
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Jesters aren't broken. No exotic perk overrides another. Do not pass go, do not collect $200.