Keep an eye out for Alerts/events that feature ORO, when completed the node does unlock and counts/works for Steel Path progression even when the gametype changes to whatever that alert/event may be and does not involve Vay Hek, such a thing has happened before, 1 of my own MR0 alts got lucky on a previous alert/event on ORO.
And yeah Netracells are still cheesable even as MR0 using decent frames such as Mesa, Wisp or Titania, not much point tho given that you cant use Archon Shards leaving only arcanes as a reward which you can just get elsewhere.