User blog comment:Care Level/Itemization Holes/@comment-8282355-20130825113555/@comment-9593635-20130825144155

If it were, say, 180g for, what, 3% lifesteal, it would be less cost-efficient than it was, then, and would still allow some early counterbuild against early poke lanes (like Caitlyn). Starting with 10% does seem a bix excessive: quints are such that 9 AD is 6% lifesteal, so 400g (10 AD) should, by those proportions, really only be giving, what, 6.2% LS?