The only way Ras has a chance in this is if he just got out of the Lazarrus pit. Only then is he physcially enhanced a little. Even then it's not to Savage's level of physical enhancement. Savage has been alive for centuries longer, has studied more fields of combat, mastered more weapons and styles and developed more of his own. He a LOT stronger, faster and with much more endurance (basically never tiring). He's a far better strategist having led armies and offer counsel to Alexander, Ghengis Kahn and many other world conquerors (often helping others to conquer large empires with the plans to assume control). he's mastered far more fields of science. PLUS unlike Ras he actually is immortal, he can be harmed physically from which he can heal (his healing factor is not fast but he has "healed" from being dead) and to increase his healing factor to match say Wolverine all he has to do is east one of his bloodline (which he's done often enough and believe me he knows where exactly his closest living descendant is at all times)
Ras has troubled batman, Savage has troubled the JLA/JSA/ LOSH/ and many more large groups of far more powerful heroes.
They need to have series of this, two conquerors that have wanted to take over the world and thwarted by the JLA. The worse thing that could is that they team up and go all out on a mass invasion. It makes you wonder did they ever wonder if they fought each other or side by side throughout the years.