You have a bunch of high tier ascended Aschebrechers you don't know what to do with? Here's a build to put them to use.

Brandstifter and double Verstärktes Brennen will get the most damage out of them. (Unless you want to use them on Schooner, in which case go for Verbrennung and Verstärkte Explosion)

Etwas Gnade III with Station des Maschinisten (Reparatur) I provides survivability. Add Ermächtigen for even more damage, Reparieren for more healing and Wiederherstellend so you don't have to worry about severe damage.

When it comes to furniture, Landwurm-Luftverpester provides a nice damage boost that's always there. Bombard-Tischlerei I is also just a great damage boost that's a pretty much must have when your main damage is bombards, and so is Bombardenwerkstatt I. Because this build will also have pretty good uptime on burning the enemy, it'll also get good value from Schießpulverbank I and into the last slot we can toss Teufelsgebräu for a bit more damage. Feel free to change this one with other furnitures of your liking though, for example with Verstärkte Balken if you find yourself needing a bit more survivability.

Armor depends on your playstyle.