Considering the amount of exp you get from doing the 10, 12, and 2 oclock Collectibles as a Miner and Botanist, Leves become a supplement to Collectibles. Once I hit 57 and got Single Mind, I was literally able to gain almost 1 million exp for either miner or botanist every 36 minutes (this was before they added the other, regular node Collectibles). Even just doing the Yellow Copper Ore or Old World Fig, you can get 240k+ exp every half an hour for a minute or so at a node. No Leve gets you that kind of exp, though it is somewhat stat dependent (gotta have enough Gathering and Perception, 500+ GP at first, then later on, 600+ GP).

YCO/OWF : Toil (300 GP) to reveal. Discerning Eye (200 GP). Methodical Appraisal (1 swing, 5 swings left). Methodical Appraisal (1 swing, 4 swings left). That should put you over 240 Collectability. Collect x4. If it did not, then up your Perception.

Not doing that slows your miner/botany leveling down. It only gets better from there.