Yes for Botanist/Mining, basically once you unlock collectibles and can get enough rating for them(need to upgrade gear a bit), you just do these, they're about the same xp/hour as leves, but they don't cost leves AND they give scrips, which let you buy all the folklore books to unlock everything, including the achievements for gathering x unique items, which reward good lvl 60 and 70 main hand tools(the 70 one is basically the 2nd best tool in the current expansion, only behind the crafted one but only after you meld that).
For fishing, it's harder to use collectibles only since they can't target a specific fish, and even when you do you can't really control the rating you'll get short of having patience up, which works ok but you don't get precision hookset until 57 so some fishes won't be available until then. Once you reach spearfishing at... 63? it becomes just as easy, if not easier than the other 2 to level however, since spearfishing functions like the others making it easier to get collectibles AND you get a ton of xp just fishing random crap because some nodes have 100% HQ so you get that sweet HQ xp on every hit. Fishing can use leves easily however and they're often very cheap so you don't even have to actually fish, fishing leves work like crafting, you just turn in specific fishes.