The attack that took out Ikusatsunagi is the same attack that took out a weak Spriggan. Jacob was just pitiful. His durability is weak.
And Bluenote isn't that strong. That guy is fodder. I can agree that Ikusatsnagi is 10x stronger than Bluenote. But I disagree that the war god is on Jura's level.
Ikusatsunagi in my opinion is nowhere near even Jura. Wendy may not have been able to stand in the presence of Bluenote's gravity, but at the same time, she wasn't DF.
DF Wendy is a big difference compared to Base Wendy.
To give you an idea, base ToH Natsu couldn't come close to defeating ToH Jellal. DF ToH Natsu wrecked ToH Jellal to pieces.
The War God along with Bluenote are both fodders.
Lucy without CSK can summon any of her spirits and combined with Urano Metria (which is a lot stronger since the last time we saw it), Ikusatsunagi is ashes.
Jacob has shown no weaker durability than Neinhart, Brandish, or Dimaria. Bluenote was a match for Gildarts on Tenrou Island. Not only was this portrayed in battle, but the manga goes out of its way to restate it again when Bluenote was reintroduced. During the GMG, Jura was stated to be on Gildart's level. We're talking about a God of War and a person who once traded blows with Gildarts, and you call them fodders?
If DF Wendy stood a chance against Bluenote she would have just entered DF instead of being pinned helplessly to the ground, like what God Serena did to the wizard saints. I don't buy for a second that Wendy can low diff an opponent 10x stronger than someone who she can't even stand up against. The more I think about it, the more ridiculous it sounds. Bluenote was the ace of Grimoire Heart. Look how much Erza struggles with Ikaruga and Azuma. You mean to tell me
Wendy is going to low-mid diff someone 10x stronger than Bluenote?