okay, from the last few days, i saw ppl stand in RoS yelling Buying Ancient Armor Remnants, Paying well!!, so i went in the mission and tried couple times, it was really hard for me at the first time, i just cant deal with those maddness souls, however,after a few more try, i discovered that if you KEEP RUNNING(use wurm running skill all the time),and ONLY KILL LOST SOUL(that's prolly the only time you gonna stop), you will be able to reach at least 60 ponits(that means you get an armor,but u have to kill at least 1 lost soul).
then, if you keep runnning and killing,when you reach the 120 ponits, you get another armor(i got 2 so far, and my record is 149, daily #9),from the above, i guess next armor ponit is 240, then 480,and i think u only need 4 to unlock all the armor in that town(total 4 heros at hero's armor guy).After all, i think this mission is not very hard if you get used to it, but it really takes a long time to do, cuz the Lost Soul appear randomly on the map,so u have to run all the time to find him, recommand use "Ctrl" when it says:"another lost soul appeared",u can easily find him
Hint: I just Noticed if you are currently in the wurm, then use wurm skill to spit you out from him, then next time u go in a NEW wrum, that wurm will be full HP. what u think??? yea, use this little trick wisely, then u can keep your wurm fully HPed all the time, just find out by yourself how it works, it really helped me alot