imperial navy bfg list

This is my first go round with BFG, let me know what you think about this list and what can be improved Fleet-Admiral 1 extra reroll Emperor w/shark boats Mars Tyrant Tyrant Gothic Dauntless Dauntless Dauntless w/Torpedos 4 Swords 2 Firestorm 3 Cobras 3 Cobras Total-1995 I plan on...