Most powerful fleet-set up thanks to Queen Liz's buff in my opinion.
Wish this image shows 6 Royal Navy Ships though.
You'd first have to sub out Vampy for something else though.
Her low HP is too much of a liability in PvP because the AI is so dumb, if you told them to shoot torps at the ocean, they'd miss. Which, naturally, bodes ill for Vamp's special torps.