I play Imperial and have all the Imperial expansions (plus profundity and Phoenix Home) and I'm having a time coming up with a Tourney Fleet...any help will be appreciated.

I've made about 4 fleets and can't really decide. So as not to sully your recommendations I'll leave the options open.

Is the tourney still upcoming? I’d be happy to help you decide...

The best way to do this is to list the fleets you have made so that people can comment on them. That way you are more likely to find something that matches your style of play. This is important because a list that suits you is more fun to play and is more likely to be played successfully.