Unlike regular nodes, rich nodes do not respawn in 1 hour after gathering them. You are able to switch characters/instances (if given the chance), to gather them again. The cooldown for the rich nodes are around 23-24 hours from when you gathered them. This farm does include gathering nearby nodes such as Iron, Platinum, and herbs.
For Rich Iron, there is a 50% chance to each strike to obtain 2 Iron Ores instead of 1. I gathered this farm in 4 characters to reach at least an hour worth of time.
To find averages, specific loots, and more, check out the spreadsheet
Node Farm Calculator
While this farm uses specific Glyphs, check out the Node Farm Calcaulator
to test out the estimated profits with different Glyphs. What are displayed in the benchmarks are not neccessarily the best Glyphs to use for maximum profits.
Thanks to Loki.6081 for the suggestion of a much better route!
Brisband Wildland: Gallowfields Waypoint [&BGMAAAA=]..
Kessex Hills: Overlord's Waypoint [&BAQAAAA=] (west side). If this rich node is Silver, then the two rich nodes in the east side will both be Iron. If this rich node is Iron, then one of the two rich nodes in the east side will be Iron. Check the closest rich node near the east waypoint to see if it's Iron. If not, then the last rich Iron is in a cave marked as a circle on the map.
East: Cereboth Waypoint [&BBIAAAA=]
Harathi Hinterlands: Demetra Waypoint [&BKsAAAA=].
Gendarran Fields: Icegate Waypoint [&BJMBAAA=] .
Lonar's Pass: Icedevil's Waypoint [&BFEGAAA=] .
Snowden's Drift: Snowhawk Landing Waypoint [&BL8AAAA=].
Diessa Plateu: Oldgate Waypoint [&BF4BAAA=].
Fireheart Rise: Rustbowl Waypoint [&BB4CAAA=] & Breaktooth's Waypoint [&BBoCAAA=].
Iron Marches: Gladefall Waypoint [&BO4BAAA=] .
Blazeridge Steppes: Behem Waypoint [&BP0BAAA=] .
Field of Ruins: Helliot Mine Waypoint [&BEsBAAA=] .
Dredgehaunt Cliffs: Wyrmblood Waypoint [&BGUCAAA=] .
Bloodtide Coast: Mournful Waypoint [&BK0BAAA=] .
Sparkfly Fen: Ocean's Gullet Waypoint [&BMkBAAA=] .
Timberline Falls: Gentle River Waypoint [&BFACAAA=] .
Mount Maelstrom: Criterion Waypoint [&BMkCAAA=] .