I had an idea come into my head recently. Image if you could get different colored flame rewards for completing weekly PoE modes. The Blue Flames for Nightfall, Purple Flames for level 32 PoE, Red Flames for 34 PoE, and finally Golden Flames for level 35.
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Completing 32 & 34 PoE shouldn't reward you with an xp boost, and honestly neither should 35