Returning player - have some questions

hello fellow PIRATES!

i haven't played the game in a while and i have some questions regarding some new items and prices. i'd appreciate if someone who's up-to-date could answer them

• what are these "vouchers"? what can i use them for?

• is the best ship for pirating still the stiletto?

• did the prometheus get the buff... please tell me it did..

• what is this dope ghostship people keep talking about? how much does a ghostship voucher go for?

• is the F2P best money making method grinding iron?

edit: also - is the ironclad any good or is it mostly show off purposes