The best way to use the revived Ra is to destroy as many opposing monsters as possible with its effect, then use it as an Extra Deck material usually a Rank 10 Xyz or Link Monster
If there's nothing legal for the Aura to enchant, Copy Enchantment stays in its current zone (unless it's a spell, in which case it's put into its owner's graveyard)
There is very little in the same casting cost region that is comparable just on the card draw front which makes these that little bit more desirable
That means, essentially, that 'Fuck you, nuke the board' is a valid strategy for the computer to follow
Keep extra sleeves in a cool, dry place away from direct sunlight
This card isnt likely to win you a game out right at any point, but not all commanders are built to do that, especially the cheap ones