Do not expect a changes in skill work...
A Trident allows to do good work with both Defensive and Offensive styles because its speed/weight/length are unique among all weapon... It's what i meant above.
To increase chance of Surprise Ending You must allow to opponent to land his attacks. At least. I.e. switch into Parry-lunge/Counter Attack.
But it doesn't look like a good idea, while JJ has these "tunics" as an armour.
You could remove Strength of the Crowd to raise that chance. And then keep offensive behavior.
// But the real defense of a speed Theatric is his ability to keep opponent in very bad states. I.e. Initiative + Signature Moves + Hamstring + Bleeding.