I like this rotation because it only uses 450gp and one regular cordial but allows you to hit 4 separate nodes, gather 2 items from each node at 459 collection and have 100% success on them. Very important though that your perception is high enough to cap out the collection rate.
ROTATION
-Hit to reveal
-Sharp Vision (50gp)
-Discerning Eye (200gp)
-Methodical Appraisal - 172 gain
-Discerning Eye (200gp)
-Methodical Appraisal - 172 gain
-Methodical Appraisal - 115 gain
-Collect
-Collect
Total GP - 450
Total Collection - 459
Success rate - 100%
Items - 2
NODE SCHEDULE
1) Start at the 10am/pm Botanist node in "The Sea of Clouds (35/23) and gather either "Heavens Lemon (slot-2)" or "Abalathian Mistletoe (slot-3)".
2) From there you have the option of going to the "Adamantite" node in "Azys Lla (24/6 - slot 6)" at 11am/pm and gathering five ore or skipping it
3) What ever you do, port to "Idyllshire" and head to the "Hinderlands" for the next node as fast as possible.
Speed is very important at this part, you want to be at the nodes general area so you can start gathering asap. Gather what you need depending on your collection timer, either "Morel (12/36 - slot 7)" or "Cloud Bananas (12/36 - slot 2)". Once you have your two items pop a "Cordial" and port to "The Sea of Clouds - Ok'Zundu". Swap to Miner and head NW to the node at (7/7), follow your collection timer and gather either "Red Quartz (slot 6)" or "Abalathian Rock Salt (slot 1)". If your quick enough you can gather items from this node before the 12am/pm timer expires.
4) After this you have some leeway as you are on your last node, head back to the "Hinderlands" and head to the Cuprite node at (34/30) and gather from that, again gathering what your collection timer is on, your GP should have recharged back to 450 before the 2am/pm window closes.
Doing this you can get a guaranteed eight items every 30 min and only spend one Cordial in the process. There are better rotations that can possibly give you 4 items but those are rng based and take several cordials as you need 600gp, I find this works pretty well but there are other options for sure.