Ok, this is really late, but...
I think the guys in the diving armor are fantastic.
All the units are good, for that matter, although if I could request, either a Nemo Pretender in a Nautilus, or a Nautilus high-level construction summon
I think it would be both appropriate and fun to include a reference to 20,000 leagues under the sea in this nation.
I forget if it's there, but if not, it'd be nice to see the Ancient Kraken as an alternate Pretender here too.