I don't remember location for Club of Detonation. For Purifier you should look at...
S P O I L E R
...Watcher's Keep.
Cheers
• "You cannot pass."..."I am a servant of the Secret Fire, Wielder of the Flame of Anor, You cannot pass. The dark fire will not avail you, Flame of Udun. Go Back to the Shadow! You cannot pass."
Gandalf the Grey
The Purifier is hidden inside a large pillar of stone on the 3rd level of Watcher's Keep. It belonged to a Paladin who hid it there to keep it safe before he died. You might have found his journal; I think he was trying to assemble the scepter because he was trapped there. Only someone of Lawful Good alignment can retrieve The Purifier; the inscription on the stone hints at that. Just have a Lawful Good character click on the pillar.
The Club of Detonation can be found on the corpse of Aurumach Rilman on the 5th level of Watcher's Keep. He's a member of one of the parties you have to fight when you use one of the keys to the next level.