pallid sparrow
For events like the Lunar Halo Radiance, where you compete to get additional shards, the 'Summon to Get Shards' should be open a week past the event and competition end date, so people who are close can still do additional summons to get shards and summon the hero.
i.e. Someone currently looking to get 200 shards at end of event, but if say they got knocked out of their challenge leaderboard teir, they'd only get 199 shards, then be out of Ardreth. Or maybe someone does a miscalculation, they could just come up short.
Summation: please extend summons for shards for competition events by 1 week past event challenge date end.