Here is an easy ship if you're piloting with your friends:
Pyramidion with gatling or carronade on balloon side and flamethrower on the right side (for gunner).
If you're fighting a pyramidion bring a gat, if you're fighting anything else bring a carronade.
Gats break armor and carros break balloons.
A side flamethrower isn't a bad idea but you wont use the back gun on the ship. I'd recommend it as a flare. It's generally best to only use your front guns and if they are on your side, use phoenix claw to turn around. 2 guns are better than one, and your main engineer always has stuff to chem spray/repair.
As a pilot bring kerosene to go faster, phoenix claw to turn quicker, and hydrogen to go up. Don't be afraid to use your tools! This is the most common pilot mistake (besides bringing the wrong tools).
Your engineer on the bottom should bring spanner mallet and extinguisher or chem spray. Chem spray is better, and if they constantly run around the bottom deck in a circle while chemming, nothing will catch on fire (for 25 seconds). All 3 engines can be repaired from below, a common mistake is believing that the main engine can only be repaired from the top. It's a good idea to hug the inside of the engine curve because you may get stuck on the outside part.
On the balloon side have an engineer with spanner mallet chem spray. Greased ammo if you have a gat and heavy clip if you have a carronade. Whenever your engineer has free time they should be chem spraying their gun and the balloon. They should do this at least every two times they reload while they are shooting too. It's very important that crew get off their guns every time they reload to repair their gun.
For the gunner bring lesmok for long range, burst for medium range, and heatsink for close. Lesmok extends range by 70%, burst spreads out more fire, and heatsink gives you more shots and makes your gun immune to fire. To test if you're in range of the flame shoot for 1 second and wait to see if the shots hit.
With the carro use heavy clip for longer range (has about the same range as lesmok flame), and regular ammo for close range. Aim for balloon.
With the gat aim for their armor. It's longer range than the flame.
Just make sure not to shoot guns if they are damaged. If your armor and balloon are chem sprayed you will be almost invincible to those pesky flames.
This is a pretty close range build so burn kerosene to get in fast. Get as close as possible as fast as possible. Ramming is good but not if your armor is broken, or if you ram your guns off.
This is regarded by many as the easiest build. This is due to the fact that many crews don't use chem spray effectively and are thus very vulnerable to flamethrowers.
If you want any help with ship builds or strategy just ask the forums. We are glad to help!