DC Ares: I find it nearly impossible to measure a lot of these types of DC characters...
Dr. Strange: 10
Immortal Hercules: 10
Wonder Woman (pre52): 9-10, I still believe Immortal Herc is stronger and more durable, though she has a speed and mobility advantage with her flight...so I think they're pretty much equal overall.
Superman (pre52): 13
Captain Marvel (Billy) (is there really a difference pre52 vs post? Besides some electical powers?): same as Superman
Orion: 15 (yes, I put him more powerful than Superman. I think Supes and he are equal in strength and durability, and Supes has a speed advantage, but Orion's Astro Force versatility and mother box gives him a measurable overall power advantage.
Doomsday: DOS 13, Overall equal to Superman...stronger and more durable, but without EP and true flight
Darkseid: 17 estimate...I think he's a peer to Superman and Orion physically, and his OE is a little more effective and versatile than the Astro Force...and generally he operates at a higher level, but is well within striking distance of Superman and up
Green Lantern Hal Jordan:10, higher lows than Dr. Strange, but lower highs, I think he's generally operating on about the same level
Ganthet: either 10 or 100....all over the place
Crisis Anti-Monitor: I'd first have to measure Supergirl Pre Crisis and add about 20%...
Mongul the senior: 10
Mongul the junior: 9
You put Thor and Surfer 2 points ahead of Superman and Shazam Billy? I agree that they are definitely more versatile - but does that versitility truly equal greater overall power?