No reason to do hunting for profits until you hit grenwalls and those shouldn't be done until 90+ with 69 summoning and scentless potions. If you're dead set on profit green salamanders will be fine. The exp isn't the best obviously but because they're used for swamp titans they sell for a decent amount. Regular chinchompas are decent exp and also stack so you might as well keep them all to sell. Besides that for fastest exp either your highest level salamander, penguins once you get the level for it, falconry with a bonecrusher and butterflies are good. However once you hit 75+ and can do herblore habitat you should swiitch over. Its arguably the best exp in the game and the juju potions are invaluable for farming and the aforementioned grenwall hunting. Best of luck!