you're talking about combat speed v travel speed. ss can charge an opponent, like gladiator can, but exhibiting combate speed is much different. supes and spidey show loads of combat speed. runner HAS successfully blitzed thanos -- he made thanos look like a fool in quest.
if they have their gems and work together they have a great chance. runner is likely (ego aside) the most powerful of the elders based on how easily he handled the ss. even without the gems they may have a chance. both (if written correctly) should be be above herald level with power primordial AND . . . aren't they still immune to death . . .?