One thing - I actually can't take three Novas. The Allies rules in the FAQ say that you can only take one allied ship for every three ships of the same class already in the fleet. So, I'd need to have nine Imperial Navy escorts to take three Novas... and that's going to be rough. However, I can use Firestorms, who have nearly the same loadout, to escort the Strike Cruiser.
I also definitely see how Gothic and Falchions are a great combo. So much guns, and all at the same range... wonderful.
I also see the utility of the Armageddon. Again... that's a lot of guns, and very versatile. However, I'm not as fond of the Tyrant. I know the broadsides is a strategy, but it seems like it would be a hard one to pull off. I think I prefer ships that can pull off a powerful broadsides, but aren't dependent on it, and the Tyrant is, very nearly completely so. How about the Dominator, or a second Gothic instead? They seem more versatile.