This is a standard AD carry page. This runepage helps you last hit, push, and trade with ease while having enough resists to mitigate damage. A common problem I see lower ELOs have are their rune pages. They often consist of useless runes like mana regen, crit chance or etc. These runes will not bring you a solid advantage like you think it will so shy away and stick with a standard AD page.
21-9-0 standard AD masteries