Wat is the highest NM u consider a low lvl? Because any NM u lower the reward on the train will start to ignore and from what I've seen once the NM train was created low lvls tend to stick to it. I think the 1-5 lvl NMs would be great to cut the respawn time in half and I don't even think cutting the exp in half would be necessary(reduce it a little). But ultimately it would be up to the lowbies to make their own party to do these low lvl NMs. Would be like a mini catch up mechanic for people coming into eureka late.