User blog comment:ZFlash/Haruka, the Thirtieth Experiment/@comment-7709681-20131011215831/@comment-10428734-20131012003708

The thing is she is NOT meant to be a melee ADC. She would be more of a semi-carry like aatrox, with a lot of burst damage (keep in mind she might 3 shot your ADC late game) and sustain damage (which would become aoe with RH). When I designed her, my main build idea was something like Treads+BT+RH+GA+Warmog+LW (not in order).

I think I know where the main problem could be: she has no disengage. When she goes in, she has to go all-in. Then she kills 1 or 2 people. Then she dies because she has no way to leave the fight. Aatrox has his revive for example, Talon and Akali have stealth, Riven has cc and dashes... But GA could already be a solution to this problem.

Haruka could be way more tanky than expected too. RH+LW (250 AD or so, that easily increases to 350 with Amok) would probably be enough to become a huge damage threat. If we don't count the Treads (who are mandatory anyways), she still has at least 2, maybe 3, free slots for defensive items. And by defense I don't mean pseudo-defense like Malmortius, I mean full-defense like Randuin or GA.

What about reducing Amok's health cost when Haruka is low? Or making the lifesteal scale with missing health? She could eventually keep fighting at low health due to intense lifesteal. But then she would just become Aatrox 2.