Who is better and why? I know Akali is strong especially due to not having mana and her passives. But she is also somewhat squish. Diana is pretty strong and you could build her more tanky. However I've never been too good at managing my mana.
Aesthetically I love akali because ninja and ninjas are amazazing
theoretically Diana since she has an instant displacement, which players have yet to master this mechanic.
Akali is better right now because of her built in sustain. This allows her to dive in and heal up any damage she receives, making her low risk high reward. Diana has a shield, but it doesn't help in a prolonged fight. You can also outplay Diana by dodging her Q and avoiding most of her follow up damage. You can't outplay Akali. Dropping a pink is not outplaying.
Obvious answer: Akali.
Akali is point and click, and she can use her ult multiple times. Diana has to land a skillshot in order to use her ult again. I'm not sure if her other moves apply moonlight, but even if they did her opponents won't just let her walk up to them.
i don't know if these two are comparable tbh, i always see diana being played as an Tanky-ap bruiser type who initiates fights with her core items being 
and 
and no longer as an assassin. Akali on the other hand is a squishy burst assassin who has somewhat sustained damage, and has a less safe playstlye IMO if you compare her to things like zed and fizz who have hard escapes. I do know a full build akali will always lose to a full build diana, that is if the diana went the Tanky-ap bruiser side.
Akali is the better of the both in terms of Assassin and duelist, whereas Diana is better as an initiator, and tank. Akali's kit flat out enables her to outplay almost anyone as long as she isnt hard cced. Diana does not have the escapes or vision tools that Akali has to outplay someone as an assassin often times. Her Lunar Rush isn't really a displacement but moreso a gap closer. Mark something and you can jump to it. You dont even have to mark something you just need vision, which is nice and works well with her Q, but it isnt enough to outplay many or use all that often.
Akali's R has more charges, her W hides her from normal vision (you most likely wont always be carrying a pink), and the biggest benefactor is her Spell vamp. Her kit is more bursty than Dianas and she can do it much faster, sustaining her health many times over and being a threat without the many Mana issues Diana has which is also a crippling factor for Diana. Diana isnt a pushover, she's just not all that efficient sadly, when it comes to the same role of assassination. If you player her on the more tanky/initiation side she's actually very good.
However I will say though that a Diana can beat an Akali in a 1v1, even if both have end game builds. Akali just has an edge due to the shroud. But if you hold on to your E as Diana and force her to pop it whilst having some W orbs up if and when you popped it, you can actually pull her into your shield and even kill her from that damage lol. I've done it quite a few times it's kinda funny. Invisibility=/=invulnerability.
Akali
