In the majority of MMOs, you increase the level of RuneScape gold your character at which point "skills" are usually just professions and what not that allow you to create, alter and boost certain items, or you. In RuneScape, all of this is tied to skills. You craft your gear or level up your skills, you build your combat proficiency and you're unable to do any of that without training. This is a fact. You are unable to even go out and quest with none of the skills you need.
It's not that I think it's bad but it can leave RuneScape somewhat weak. The process of gaining 99 points in a skill on RuneScape is normally as fast as gaining max characters in another MMO generally speaking, for the most part (unless we're dealing with worthless abilities like Cooking, Fletching, Firemaking or the like, which can be achieved within 60-70 hours). In fact, it's even faster.
In terms of boosts and special effects, that's what's at the heart of prayer. It's purpose is to give players bonuses and values in combat that other games typically give the player through tradeskills, for example, crafting runes of armor to connect to your armor or enchanting your weapon to become more powerful as well as other such.
RuneScape doesn't have that thus it requires prayer to function as such and give players that type of choice they'll require when the end game content gets harder and harder (God Wars, Dungeoneering and other bosses are prime examples of this) in addition to gear, which can only offer so much, which is why the potions are becoming more powerful too. In reality, tools and equipment (as well as prayers), were being rapidly excessively powerful in PvP. This led to buy old school runescape gold the absorb effects that armor suffers from.