... and items such as Harry's rings appear to be used as part of the attack.
They are not used as part of the attack. Using the Rings
IS the attack.
For that matter, the text on YS279 appears to tie activation rolls primarily to targeted spells.
Activating the Maneuver would not need a roll, but it would still take up the normal action for one round. forcing you wait to the next round to attack.
But i'm just realizing that we are starting to talk in circles here.
Lets just sum up
If the Enchantment is an attack, for example Weapon:4, 2 times per session, then using that enchanted item IS the attack.
Hence 1 action to attack with the enchanted sword.
If the Enchantment is a maneuver that creates an aspect on the sword, for example "absurdly sharp", then activating this enchantment to create the aspect is one action, and attacking with the blade while tagging the aspect is another.
Hence 2 actions to attack with the enchanted sword.
2. The same sword...or maybe a not sharp replica...easier to get by those pesky mall cops...that is transformed into "Incredibly sharp" by the magic twice per session. It then becomes weapon 2 with a free tag on the aspect to bump it up...it remains sharp for the scene and then fades waiting to be activated later. An action to activate the sword at the start of the fight then an action to attack and tag the aspect.
(it was just created at the start of the scene so that works for each activation of the power)
Both seem like good options just a matter of flavor...But in both cases..How would they recharge?
Actually, in case of version 2. One would most likely reduce the power to 3, so that a fragile aspect is generated, and put the remaining shifts into uses. The aspect would then stay for 1 round, giving you just enough time to benefit from the free tag. Taking the values the OP gave in the first post that would mean a fragile aspect, three times per session. And as usual more uses can be gained by taking 1 point of mental stress.
Recharging would happen automatically between sessions, it's part of how enchanted items work.
Narration of this recharging process, if necessary, is totally up to you.