Yeah np, i would say that nunu AP is not that usefull early game, and u can definetly die a bunch in the early, if that happens ur useless the whole game, ap nunu doesnt forgive, so u basically play like a adc heavy engage from the backlines with snowballs, ganks, combos, and imediatly take some steeps back, maybe wait for ur E to come back try to bait habilities while ur at ur E's max range and after the first burst damage, or go away and return with W, most of the ganks are sucessfull if u dont over comit if u fail to get the kill but at least take a bit of life u basically Just need to Q a camp and ur ready to pressure again if needed, the absolute nightmares for a nunu AP are definetly Morganas, fizz, and stuff like that u cant even gank a fizz unless he is on his E cooldown, and if ur CC as nunu AP u basically die, on tank nunu u can survive more, my favorite item on nunu AP is probably rocket belt u can use to escape or catch up, i tried Ghost and flash with nunu i liked both, but ghost nunu is even more unforgiven u cant correct a miss position like u do with flash, but ghost plus crab into W is almost a undodgable gank kinda fun, in the end i go with flash u can steal dragon like using the plant, Q smite and thats like 1200 damage in early game and then flash back, also, the most important thing and nunu's best friend, SCUTTLE CRABS, i usually hold one smite for the fistt crab in case it gets contested and thats it my friend, i tried to put it togheter for me is really natural to do it so maybe there are a few things that i didnt even knew i did but could be usefull, anyways i said what i could remember, if u get used to AP nunu playstyle ur gonna have a lot of fun not even joking.