I think you have enough for 95% of the time.
I have never used a storm jib
nor a trisail
I have tried a free flying masthead yankee but it was a real hassle hoisting (you cannot really use a furler
if the tack is attached to a strop). And the times you'd use it are really limited. Sheeting it might also cause problems.
The screecher probably won't get as much use as you might expect. I had one on my Eclipse, but apart from a few days when crossing the Atlantic it stayed in its bag. Usually because in light winds we were either drifting along, enjoying a sleepy day, or we were motoring to get to our destination
And Eclipse was a much faster sailing boat than yours and only had one 9.9hp outboard
as its main engine
Having said that, we just came back from an Annapolis/Bahamas/Florida cruise
on our Romany catamaran
with just a mainsail
. I am currently buying
and still debating about the screecher.
I don't know your sailing conditions, but the east coast
US and Bahamas
have very light winds and a screecher is therefore useful, but never as fast as motoring.
I hope this helps
Have a great cruise
Richard Woods of Woods Designs
Woods Designs Sailing Catamarans