Nasus seems like a fantastic option on this meta
He is quite weak early game, but it's not like he can't just farm safely. His mid game is godly.
The reason why I think that Nasus would be a good option on this meta is due to his ability to hard counter ADCs.
-
His Wither can shut down any ADC, even caster ADCs are heavily crippled by it due to reduced kiting power when affected by it. ADCs are popular right now.
-
Nasus can stack armor and become immortal against ADCs. He doesn't need a lot of offense thanks to his Q.
-
The masteries benefit him heavily. You can get 0-18-12 and get the 5% cooldown reduction masteries allowing him to have 45% cooldown reduction. Alternatively you can go 0-12-18 to have damage reduction, or healing based on your HP. You don't really need points in Ferocity.
-
You can use Triforce + FH + Visage and achieve 40% cooldown reduction with just those items. This takes out the need to use CDR runes or Ionian Boots.
-
Nasus is an effective counter against many of the currently popular Guinsoo's Rageblade users, such as Jax, Irelia, and to some extent Kayle.
-
Most people are not purchasing anti-tank items on ADCs, such as
and 
. -
I forgot to put that - Because more and more people are starting to take Ignite top lane, they are unable to stop Nasus from splitpushing by just teleporting to the tower. Granted that Ignite gives them more power to shut down Nasus early, but it's nothing that playing safe can't solve.
Why Nasus isn't more popular?
. Ill give you a couple of champions that are viable in the new meta and ill explain why . 
Awesome gap closer to focus down and hunt down enemy's in team fights , 
hes always been strong but now hes balanced but still strong enough to seek out adc that are our of place in team fights all you need to do is land that Q and follow up with W,E and R and the ADC is already half hp and your team is already close enough to rape the adc . 
same thing just buy 
and stab the adc in its but and just focus the adc . 
This champ is a bit risky but still viable you must have a strong early game to win with him if you do you must keep up with your team or be ahead and seek out those adcs your kit is made make the adc stay in 1 place for a long time. 
Also a good champ has a good passive if you get close and your team can do the dmg . Here are some champs i DO NOT RECOMMEND . 
hes a strong pick but only if you snowball REALLY REALLY REALLY hard like really hard with these new adcs its like we gave all the adcs a can of bug spray . 
this champ if you miss your Q will be crap and if you are not really skilled you will be as useful as a hole in a condom . 
Take away the R and you got BAD nothing else to say his kit is just awful aginst these new adcs his ult is like a get a free re positioning card for the enemy adc .
Im not saying hes awful i mean he has reall good damage but everyone after his nerf about a year ago just started going offtank/tank so now he is really weak against adcs IMO . Well i hope this helped and Nasus is only good if he has his slow on them but cait can just 50.cal away from him or graves can dash or ult . I think doggy is gonna get kited hard but u know he has good damage if he gets close nasus wins but to bad adcs are ranged ! i hope i helped !
