First understand that the built in attack speed on its own helps bridge the gap between the ap and ad forms or as you put it helps; “multiplay one-another's effectiveness”.
(rather than being like Crit and requiring additional item slots to really shine), causing the %HP to effectively free up an item slot for defense on Jax.
Either way your scaling as the game progresses with items or not, so its a pretty negligible/mute point
the same can be said for rageblade. it scales if you get more cdr since you can spellvamp more from say poppy's q.
it can also scale well if you get hexdrinker later into the game or just get tankier to increase your odds of surviving longer at lower health.
the ap ratio can help a xinzhao/warwick who get spirit visage later in the game. Bortk with spirit visage all your getting is 2% lifesteal.
Its not trapping when your kits benefits from all of its stats. For example it buffs jax's ult more than botrk does.
ad and ap can multiply each other's effectiveness.
In the case of poppy fizz, nidalee and twisted fate. Their ad is converted into ap thereby allowing void staff to complement it.
it depends how you see it. Say i'm skarner. and i get bigger shields from the ap. that means i live more allowing me to auto you more.
My ap just helped me do more ad
wits end and rageblade could pair well on a nunu with blood boil. You can quickly lower their resistance with wits end and then q them. Or shyvana with e.
wits end and rageblade should be a match made in heaven. Atm its not even a thing.
volibear ult can spellvamp off of neighboring creeps with his ult. Even if its 30% of 20%spellvamp. It add up. Moreso than just with 10%spellvamp. At least with this buff it'll be worth thinking twice whether to get king over rageblade.
I understand why botrk is the superior option. What i'm trying to say is that it shouldnt be that much of a no brainer on certain champs whose kits have ap ratios for a reason. Right now only trinity force seems to do it for those champs.
Meanwhile rageblade is just sitting there.
a buff to rageblade is a buff to expanding the repertoire of viable build options for a slew of champions including:
shen,
xinzhao,
volibear (ult),
warwick,
udyr (Not just for PhoenixDyr either, did you know his q has a 100% spellvamp ratio),
shaco,
skarn,
jax,
shyvana (below mallet example),
sion,
irelia, the new
fizz,
nidalee,
evelyn,
poppy.
Kennen electrical surge passive auto scales with ad. Similarly
can make use of some ad. if
can pull off full AD leblanc. then there's no reason a
couldn't benefit from rageblade. The attackspeed on her passive would synergize with the extra ad. And spell vamp is a good item on her, her ult gives her 100% spellvamp.
Even
Akali since her passive gives her auto's ap dmg getting attack speed is worth while item on her.
I think akali with rylais wouldn't necessarily need the slow from gunblade and could be fine with just getting rageblade instead.
I'd say it would work on shyvana but probably not since she has no cc (unless she got mallet) actually come to think of it that would be pretty good.
So rageblade mallet wits end could be a viable build. Finally a build that doesn't call forth the mighty sheen. and this works nicely as shyvana doesn't use mana.
all these champions have ways of stay alive at low health long enough to make it worth while to benefit from a sustain when low and or they tend to build somewhat tanky.
Its also particularly handy if say they face the likes of
top, or
jungle or even
support etc and you don't plan on getting armor pen but would rather counter their armor scaling by making them get more mr.
I would also like to bring up this larger envision I have in mind... You see, I recently posted this thread proposing to allow lich bane's sheen proc to lifesteal.
{quoted}
If it were up to me I'd even give lich bane 100% ad (it builds from sheen after all so why should it be less on the final item).
You would then lower the ap ratio considerably all the way to 25% (or 30% depending on pbe test results) but increase the item's base ap up to 100. that way it works nicely on both champions who don't use lifesteal but wish to get more out of their deathcap giving their base spells more dmg. and it doubles as a good way to give hybrid champions who lean a bit more on the ap side a way to benefit from it.
Picture this, irelia with lich bane and rageblade instead of botrk trinity force. her e gets the full 20% spell vamp. and her ult scales with ap. giving her more sustain from it. She would likely save her ult for when she's low on health. Her ult was made for rageblade.
with these revision I think you'll see as many botrk trinity builds as you'll see rageblade lich bane builds.
One catering to a more ad the other for those with better ap scaling.
Both closely matched