Well, if the theme of the list is to spam strength 8, then you are doing well. But of course, you can always do better
If you are not adverse to allies, then you can run something very similar to this out of the Dark Eldar book. Of course, i am not saying you should swap to main Dark Eldar, Corsairs are unique and i'd like to see you play them, but i am suggesting dropping a few things to get your hands on a few Dark Eldar toys that fit well with your army.
The detachment would look like this.
HQ: Duke Sliscus. 150 points. (Goes with the theme of Corsairs. Gives all
DE vehicles Deep Strike and packs a strength 8 Pistol!)
Troops: Either 5 Kabalites + Blaster w/ Venom + extra cannon. 125pts. (Poison is always nice. +1 Strength 8 shot)
or
5 Wyches + HWG in Venom + cannon. 125pts, (Your Corsair prince unit, but in troops, cheaper with more haywire!)
Elites: 4 Trueborn w/4 4 Blasters + Venom + Cannon. 173pts. (Deep Strike, then +4 Strength 8 shots)
Total. 442 points. 6 Strength 8 shots
AP 2 Lance. 28 poison shots. Straight swap for a Corsair Prince, one of your troops and the Jet bikes. What do you think?