Gunslinger Build (Lv. 10-200)

I don't get why you think Fire Burner is so bad. I see a lot of videos where people are using it. It even has the effect where it the attack continues to damage the monster after you shoot them. I think it's a great skill and its worth maxing. I would take points out of cooling effect and make it to level 25. Or bring Gaviota back down to 15.

I've only seen one video of it used.

The effect damage really isn't noticeable at all. It does less than a F/P's poison. If you're just using it for the effect damage, it's better to keep spamming another attack since the effect damage is hardly noticeable at all. As a mob attack, Battleship Torpedo is already better than it at level 1 even against Fire-Weak mobs. Plus, is it worth giving up precious USE inventory slots for Blaze Capsules when Fire Burner is hardly a useful skill?

Gaviota on the other hand does a lot of damage and it has a huge range. It's a summon too so it attacks by itself.