so the best is to go for the metallic sheet and got it encrypted
Hello! what exactly do you mean by that ?
Perhaps he was referring to stainless seed plate, you can read it here:
Stainless steel Bitcoin Recovery Seed Plate.
Yeah, I think paper wallet is suffice, but as @Welsh mentioned you have consider several factors, might be good to have a safety storage box for your safekeeping in a bank if you can have that option as well.
Just remember though that it's not 100% guarantee, this kind of setup has it's drawback and you really have to prepare for the worst situation.
In addition to what has been said, OP i expect you to read through the lines and got the idea, i was referring to how you can get your seep phrase secured using a metallic sheet by getting your seeds encrypted on it, in case you're not still clear about the point we've both given you, this is another additional one to what Baofeng has given,
https://bitcointalk.org/index.php?topic=5389446.msg59506339#msg59506339 it's all about how you can secure your seed phrase with washers.