This thread is like the blind leading the blind. The last two options are equivalent and better than the first. Obviously using three layers of encryption is more secure than using one, but it in terms of which order you use them in (like layers of an onion), it makes no difference if you're using the same three ciphers. Keep in mind that you will pay a performance penalty for each layer of encryption, which may manifest in normal app use taking 5% longer (per layer), but disk heavy activities (like bootup) can take up to twice as long (per layer). Which tutorial? Did you follow this one? https://tails.boum.org/doc/first_steps/usb_installation/index.en.html