Alright, I'm at a bit of a mental block for this session and could use some help mainly in coming up with obstacles and aftermath.  What I've got so far:

The PCs

• Vincent - A Creesh (cat person) sporting chef with a disdain for Dreed.  Currently host to a mystical Vernia (sky island) map emblazoned on his chest.
• Crispin - A half-dragon Emerald Knight (they wear magical mecha armour) assigned by a Rinden king to safe-guard the Vernia map.  He's on a quest to find the dragons of Coatestowne so that he can discover how to become fully human.
• Sheza - Half-dragon / half-Kobold pirate captain of the Mako.  On a quest to find the dragons of Coatestowne so that she can discover how to embrace her draconic heritage.
• Klaus Klements - Pirate and inventor with a giant steam-powered walrus mecha.

Recurring NPCs

• Acanthus - Sindran wizard tasked with recovering the Vernia map for some unspecified (i.e. I haven't thought of a good) reason.  Sindra has invaded Rinden, and blockaded Helt and Lochria (where Coatestowne is).  Oh, and he turned Crispin's girlfriend, a sorceress, to stone in the first session.  Last seen at the Blood Cove pirate hide-out, where he'd laid a trap for our heroes.
• Melvin - Small-time grifter.  Last seen at Angel's Ford (Rinden, in Session 1), where he was posing as a famous Dreed sporting chef named "Ganji the Magnificent" before Vincent pwned him in a cooking contest.
• Sigfried - Emerald Knight of Rinden, and rival of Crispin.  Last seen at the burning of Angel's Ford, where he was convinced that Crispin, the half-dragon freak, had turned traitor and delivered the royal palace to Sindra.  Not seen since Session 1.
• Sindran Storm Guard - Wizard knights of Sindra, they're elite shock troops with ensorcelled armour and shock lances that discharge bolts of lightning upon striking.  Last seen at Blood Cove.

Being BESM, there's a seriously big fighting prowess gap between Crispin and Klaus and...  well, everybody else.  For those unfamiliar with BESM, you roll 2D6 and try to get under your ACV (Attack Combat Value) to hit, and under DCV (Defense Combat Value, always ACV-2) to defend.

Crispin has ACV 7 / DCV 5, Vincent has ACV 5 / DCV 3, Sheza has ACV 5 / DCV 3, and Klaus has ACV 8 / DCV 6.

Anywho...

Last Session
Our heroes had just barely escaped from a trap at Blood Cove, where they'd been trying to obtain forged passage documents to get through the Sindran blockade of Lochria.  They were successful in escaping Acanthus' clutches, but not in gaining the documents.

They decided to head directly for Coatestowne, despite there being an obvious blockade point in a straight that they have to navigate.  With some tactical acumen, they sussed out the likely force deployment (4 ships armed with alchemical flame cannons and sundry troops, and at least one summoned guardian monster of kaiju-proportions; SOP for Sindra).

They also came up with a plan:  Using Bertha, their submersible steam walrus, they would stealthily approach the ships in the blockade at night, drop off Crispin on one, Vincent on another, and Klaus would have Bertha smash the hull of the last vessel...  all simultaneously.  Then Sheza would come in with the Mako and use its main gun (it's anime, so of course her ship has a main gun!) to attack the kaiju.

We left off last session with the two PCs sneaking aboard two of the three ships and Klaus heading for the third, and it was revealed that the guardian monster was some sort of airborne giant squid.

So, any suggestions for complications or ways to spice this up?  Also, I'm a bit bereft of ideas for what happens when they get to Coatestowne harbor.  I was thinking of maybe having something a little more intrigue-heavy, maybe dealing with a succubus...  but I'm not sure how to pull that off.

Game's tomorrow and I've been fretting over this for at least a week, still with no clue.  Thoughts, ideas, suggestions?

Well, you know that they're going to succeed so why not make it surprisingly easy for them?

...

Okay, fine. So the Sporting Chef sneaks aboard Blockade Ship A, Crispin aboard Blockade Ship B, and the Walrus is to attack Blockade Ship C?

Obviously, Blockade Ship C is going to get scuttled before the other two PCs are able to eliminate the crews of the other two, right?

When Vincent sneaks aboard Blockade Ship A, he finds the crew already dead at their posts or missing entirely. Then cut to...Sir Crispin.

So Crispin sneaks onto Blockade Ship B, and after stealthly eliminating one of the sentries, he heads below decks (you narrate all this) just to be attacked by Sir Sigfried who accuses him of being a traitor, and won't listen to reason. Sigfried is also trying to be quiet and accuses Crispin of trying to alert his henchmen as they duel though the depths of the Blockade Ship interrupted at times by lone sailors on patrol, lamp in hand.
It turns out of course that a Riden royal envoy was captured and that Sir Sigfried has been ordered to the rescue.

"Of course I should have expected scum of your standing to be behind this. Sir Crispin the Traitor, you will die by my blade!" -Sigfried

During the Emerald Knights duel, cut back to Vincent wherever he got to. He gets shot at by mysterious archers (who turn out to be Riden archers under the command of a brave Emerald Knight, and who think Vincent is another one of the Sindran sailors).

Then Blockade Ship C explodes brilliantly before either of the other two characters, unless they've proved surprisingly capable can shut down the other ships, forcing them to band together with the small band of Riden forces trying to rescue the captured envoy.

While the now alerted, Sidran forces rally together of course.