Lol xD .. Jibu didn't said that GNW is the Strongest Treasure, what he said is "GNW Treasures is currently one of the best treasures", so far from what you said .. And from Jibu's perspective, GNW treasure is one of the best and it is his own opinion or personal choice, so it is not giving false information .. i don't see false information from what he said, you just read it wrong and gave a bad meaning .. understand the statement carefully before throwing such accusations ..

Anyway, about the topic, keep saving your scrolls for now as you said that you already have some great ninjas to play with, Minato is good enough for you to be on the game, just use kurenai and iruka or gaara with him, you will do fine in battles .. When Jinchuriki 1 treasure comes to your servers, then get Roshi, he's one of the versatile ninjas in the game and usable for long runs .. About getting Itachi Susano'o fragments, just like Jibu said, there are other ways aside from using Seal Scrolls but that depends on you if you have other resources, and what i mean by resources are coupons and ingots to spend when Itachi Susano'o showed in event .. But if you don't have, then pulling from Treasures is the only choice for you .. GNW Treasure Ninjas is good but it depends on your game style, and if you really want to complete Itachi Susano'o then reconsider things before using your Scrolls ..