Hey, I am a silver player who saw an absence of this kind of build on here. I either saw too much ap, or not enough. I think this build combos it perfectly. Stacking health and ap first, focusing on a farm/regen based lane, and then stacking resistance in late game for those clutch ult plays. AP Nasus ult does a lot and his lifesteal helps a lot there. If you stack his q right, with its short late cd, you can spam it for massive damage. His e is really powerful in lane with ap because of most of the on hit damage.Its long range provides great harass in lane

Pros
-Great A/E Dmg
-Ult dmg scales well with ap
-Q is UBER OP late, use it on a carry tice to make him back off
Cons
-Bad Gap close, slow doesn't do all
-Weak w/o ult in teamfight
-poor clear early

Standard top spells for great plays bot with the ult and slow allows your team to engage and secure kills. Flash is good because he has little escape. Ignite against mundo, keep tp

Team Fighting, as the tank, you absorb dmg, that doesn't mean you cant deal it. Only engage with your ult, as the aoe is amazing, combo that with an e and const q the carries, you might die but be sure your team will get alot of kills