NH stats: 300 HP, 90 AP, 15 AH. Mythic passive: 5 AH per legendary.
RB stats: 250 HP, 90 AP, 15 AH, 6 magic pen. Mythic passive: 5 magic pen per legendary.
Almost nobody has built Night Harvester all season long. Its 1.2% PR is dwarfed by Rocketbelt's 4.5%, despite fulfilling the same niche of "AP damage item for champs that don't need mana". Because of the magic pen it offers, RB provides far more damage than NH even though NH was designed to be a pure burst item. Even Vladimir, who loves ability haste, is building RB over NH because it's just that much better.
I think the obvious solution is to switch the stats and mythic passives around -- this would bring both items more in-line with their intended identities, with NH being the burstier, pure damage item that enables multikills and RB being the utilty-oriented one that provides mobility and survivability. It would also force champs to choose between building more mobility or more damage, rather than just getting both wrapped up in one convenient item the way they do currently. I'm sure at least part of the reason Akali and Katarina can afford to drop Flash this season is because RB gives them everything they need, including yet another mobility spell in their kits.
It's been a full year since the item rework, and now that it's preseason it's the perfect time to start looking at these things. I know people currently have a lot of issues with items (like MR options and people being unhappy with Riftmaker), but this is one I haven't seen being talked about at all, and I'd love to hear what you guys think.
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