Back in C3 Strider corpse is only down for 3 minutes, then the Strider disappears.
I think 3 minutes is pretty low so we should increase the corpse time to 10-15 minutes. This gives enough time to run back to any town and run to the Strider’s location again.
Since this information was unknown to you I will give you 2 Pet Tokens to exchange them for a Strider at the Donation NPC.