Think about it - how in the nine hells would you DM this scenario:
The PCs have set up a co-ordinated raid on a small island known to be a pirate base. They realize the pirates are allied with a couple of dragons and have brought along some aerial support, and the local navy has sent a few ships along for support and transport. The dragons return just as the ambush is launched, meanwhile a pirate ship tries to escape, producing this:
- a conventional D&D combat happens on the island, an away team of PCs is taking on the pirates who didn't get on the escape ship; but it's a rolling brawl with people running and chasing and hiding all over the place then reappearing at opportune moments;
- at the same time two PCs on flying mounts are engaging the dragons in an aerial combat above and around the island;
- meanwhile the rest of the PCs are on one of the navy ships and are engaging the fleeing pirate vessel.
Spells (and arrows) from the island might interfere with the aerial battle and-or with the ships;
Dragon breath etc. from the air might interfere with the ground battle and-or with the ships;
Artillery from the ships might interfere with the ground battle and-or the battle in the air;
The winner(s) of any battle can interfere with any battles remaining.
Design a system that can handle this (bonus if it also resolves the scenario in under two hours) and you have a winnah.
Lan-"I'm tempted to try and set up a scenario like this just to try it"-efan