If you have multiple ravagers they can follow you onto zip lines

Weight reduction by half wood, thatch, metal(not metal ingot),fungal wood, stone, gems, obsidian, fiber, crystal,

Ravagers can actually be picked up by the argentavis. Upvote so people know

Once tamed, ravagers can walk back and forth on zip lines , you have to look at the zip line and it shows a cross hair and then you jump on to it pressing A