sanji is inconsequential at best he has a random powercreep from germa mods that DR cant pierce him or some gay ass asspull but he lacks CoC and his CoA is mediocre at best he does NOT phase Imu and is a literal ant to him.
Zoro can hinder him by slicing him but he has no real control over his CoC to do anything especially againt fully realized Imu in the flesh.
Loki, Gaban & Luffy are the only 4 on the entire island that can actually do anything to him and even then Gaban would just get DR the same way Rocks did.
imu isnt going to remove any of them of from elbaph.
sanji and zoro arent even going to see imu.
It's fine if you believe that, and it's not like I said anything about those four posing any Threat to Imu,
It's just a suggestion I gave, those Four are a Threat for Holy Knights, so Imu wants them gone before He can leave & let his Knights take over.
When Kuma arrived in Thriller Bark, He also said He gonna start with Zoro for example,
When Kizaru arrived in Sabaody, He immediately started with Zoro,
And when Kuzan arrived in Sabaody, Zoro was first one to make a move against him, (Aside from Robin which was Personal)
Even though Zoro was no match for any of those Three.
It has nothing to do with Power Levels, Zoro & Sanji might end up as Imu's First Targets, and it's not hard to believe it seeing how last chapter showed Sanji alone with Killingham, and Zoro discussing what to do with Sommers Heart, so first thing Imu might do is free his two henchmen.