Wow, that's pretty nuts. I didn't know you could get multiple surge of powers in a single room! I wouldn't write off the RNG yet for handing out artifacts, just remember that if more artifacts are generated (e.g. guaranteed greater vaults) the pool for the better artifacts has increased in size vs the pool of shoddy ones now that you've gotten Long Sting and the scorched spear out of the way...
I like the Silver Key though. That's nice
Gate Closers
Snarky - male dwarven paladin (lawful, L46) - Sel'yn - female grey elven wizard (neutral, L35) - Malicious - male dark elven beastfighter (chaotic, L35) - Telariel - female high elven priestess (lawful, L37) - Poppy - female human assassin (neutral, L50) - Orkboy - male orcish barbarian (neutral, L33)