Thank you Snowwarrior for your input; I love you :). The reason I said Exhaust is the best spell is due to my playstyle. I use it mainly for a 2v1/ teamfight situation to shut down a player that is ahead so I can have enough time to A: take them out; or B: get away safely.

Also I explained why, in my build at least, cleanse wouldn't be a viable summoner spell. The reason being that I have the defensive mastery Juggernaut as well as early mercury treads, making 45% of CC mitigated. Since you have then cleared Nasus of his biggest downfall, you then opened up a space for an extra tool e.g.- Exhaust. Not to mention that Exhaust can shut down AP bursts like Kassadin, whereas Wither cannot.

So in essence, you have a wonderful point, but I've covered the basis as to why I did what I did. Thank you so much for your feedback, and I will definitely give you rep votes.

<3Kognition.

voting +1

Looks good thought Im not a huge fan of extra tanky/atma's impaler method it works and so +1

however I would recomend including cleanse and maybe heal to your list of usable summoner spells. Also while exhaust is nice wither is a much more powerfull version of it and thus taking exhaust is not necessary (if you like it thats fine too) so I would go something like ghost/cleanse or heal/cleanse, and ignite is usable since you will probbly be solo top in most scenario's so ignite is a great harassment tool.

Great build that balances survivabiliity and damage! I too am a die hard user of IF on nasus. I believe also that defensive masteries now offer an amazing advantage on nasus.Great work! +1