I am trying to build a gunslinger character for a naval warfare Pathfinder campaign. In a nutshell, this character would mostly stay on a boat and fire siege engines at enemy ships. I intend to take the siege gunner gunslinger archetype. The next step is to select feats, but I'm not entirely sure which combat feats are applicable to naval siege engines.
For starters, the rules of using naval siege engines lists 4 specific feats: Siege Gunner, Siege Engineer, Master Siege Engineer, and Siege Commander. These rules also mention that critical feats of the siege engine operators cannot be applied.
But what about other combat feats, specifically those that branch from the Point-Blank Shot feat? For example, the Far Shot feat would be helpful for targeting faraway boats, while Deadly Aim could be useful for dealing with boats that get too close.
I think that the feats that mention one type of weapon (bow, crossbow, etc.) would not apply. I don't know of any siege weapons can be fired multiple times per turn, therefore any feats involving multiple attacks would also not apply.
Among the ranged combat feats that branch from Point-Blank Shot, which ones are usable with ranged siege engines?