OreAnnouncer is consisted of 7 permissions, you can use one permission to give them all.

You can give all permissions by using this one oreannouncer.*.

oreannouncer.alertupdatesSend a message if there is an update
oreannouncer.bypass.announceBypass announce on dig
oreannouncer.bypass.placeBypass ore announce on own placed blocks
oreannouncer.cmd.helpAllow access to /oa help
oreannouncer.cmd.hideAllow access to /oa hide
oreannouncer.cmd.reloadAllow access to /oa reload
oreannouncer.seeSee announced messages
oreannouncer.* All permissions are granted