Player who already knows the holder
If you already know the character who will use Fluff of Fearlessness, acquisition is straightforward. Verify the reward source, claim the Arc, equip it, and begin staged testing. This is the safest and most efficient scenario.
The reason it works is that the claim immediately becomes active account power rather than an inventory item waiting for a future plan.
Player who is still choosing a main
If you do not know your main damage dealer yet, wait if possible. A selector or reward can lose value when chosen before the account direction is clear. Fluff is a good Arc in the right context, but it is not a universal account answer.
Use the time to test Solid characters and decide whether the post-Ultimate damage window fits your preferred playstyle.
Player who owns better options
If you already own stronger dedicated Arcs for your main damage dealers, Fluff may be a lower priority. It can still be useful for a second team or future Solid character, but it may not be the best immediate claim.
Check whether another reward fixes a more urgent weakness before choosing.