Talk:Essence Reaver/@comment-13372515-20140606134823/@comment-1330314-20140613200803

The point to caster carries is that they scale better with a mixture of attack damage and cooldown reduction, rather than raw AD+AS+crit. Varus and Graves, despite their burst, are still autoattack-based marksmen who rely on the latter stats to do well. Champions like Lucian, Corki and Ezreal, on the other hand, spam spells very quickly and therefore run the risk of draining their mana, which is where Essence Reaver comes in handy for both the spam and the mana issues. Even the likes of Graves, Caitlyn and Varus poke, so while Reaver would not be the best pick on them it would still be somewhat beneficial.

The issue of stacking raw AD to deal more damage with every rotation is that AD is, by design, not a stat designed for burst. Sure, you'd get a lot more burst out of assassins like Talon or Zed, but even those champions itemize for CDR as the utility they get from it surpasses raw damage past a certain point. Additionally, almost every champion has a low-cooldown damage ability, and in the case of AD casters this forms a large part of their damage, so being able to cast abilities more often tends to trump AD stacking.