If it's a multi-faction ship or a Tinkrell ship that's quite easy to do. The Longbow is single-faction and not really a competitive design. If you managed to do it with an 8000P single-faction ship that's not Tinkrell (or a Sentinel nuker), I'd like to see what you used because that's pretty impressive then.
Deluks ran a tournament a while back which allowed ships above 8000P. I think (?) you participated in it, actually. I didn't really know what to make for it so I just kinda took the opportunity to expand a bit more on the lore of the CC because I'm normally too lazy to spend the time making their larger capital ships if there's not a tournament or something going on.
All of the Confederacy ships use dendritic structures; it's just their particular aesthetic. I'll probably make a solid-hull Titan at some point for one of my other factions though, at least provided I can motivate myself to bother.