It seems like the "Post Your Build" Threads are fairly popular on here and a good way to help out new players with avoiding some mistakes.
I know it did for me. It also serves as bragging rights for the Vets.
Unfortunately I haven't seen one here focusing specifically on the cannon skills.
(If I missed it someone point me to it please)
So...
Post your build and Discuss...
Cannon
-=Combat Skill=-
(*/5) Shoot
-=Ammo=-
(*/5) Round Shot - 450 to 900 damage Maxed
(*/5) Chain Shot
(*/5) Grape Shot
(*/5) Firebrand
(*/5) Thunderbolt - 1050 to 2100 damage Maxed
(*/5) Explosive
(*/5) Fury - 855 to 1710 damage Maxed
-=Passive Skills=-
(*/5) Rapid Reload
(*/5) Barrage
(*/5) Shrapnel
(*/26) Total

Here's Mine @ Lv16 Cannon
-=Combat Skill=-
(2/5) Shoot
-=Ammo=-
(2/5) Round Shot
(*/5) Chain Shot
(*/5) Grape Shot
(1/5) Firebrand
(5/5) Thunderbolt
(*/5) Explosive
(*/5) Fury
-=Passive Skills=-
(5/5) Rapid Reload
(1/5) Barrage
(*/5) Shrapnel
(*/26) Total
I've been hoarding the points since I'm unsure if I'm gonna dump them into passives or ammo skills yet.