This step does not change much through the past. One reason is that we look at fast: Hill Giants and those pesky skeletons of the last episode became even faster. But all is not lost: some new monsters that both have reasonable drops and a rather weak defense would have a go at them. The skeletons mentioned earlier, drop herbs that you could sell unidentified until every 1k. For fast there are various monsters to choose from. Sad but true, 20 the following levels will be a little boring.
Moss Giants and Elves for both members and F2P, and members get an added bonus if your level is high enough Slayer: Pyrefiends (level 30 required). From level 40 ranged, it is time to say goodbye to your trusted iron arrows and switch to steel and buy runescape gold in the game, or mithril (or even outright if you can afford it). Although there are certain thresholds where the arrow is equal to the down arrow next best in maximum success, it saves time and place inventory if you stick to one type of arrow.
Members, once again, have a great advantage: two very good spots around. I would not recommend switching to higher knives: They are hard to find, very expensive when buying in large quantities (if at all available), and do not hit high enough to justify the switch. Moss Giants in F2P can be found in two, more or less accessible places: Varrock sewers and on the island Crandor. Crandor is the best option to go, but you have Dragon Slayer to access it.
Once again the island Crandor for F2P. Pyrefiend is once again a monster killer, but requires no special equipment. A few good range spots about, and your skin is D-perfect defense against their magic based melee attacks. They can file Clue Scrolls Level 2, a lot of fire runes, gold ore and steel boots and rs gold in the game. Level 30 Slayer is required. Around level 55 ranged, Moss Giants become pretty fast xp if counted per hour played. Moreover: they have some decent drops, until D-lance in the limbs. Hobgoblins can be found in many places in Member countries, but only a few locations in F2P (a view of the guard that is).