Plank Walker gives you HP when you use Shortcut. So this is basically overpowered Life Steal.

Mortal Skewer gives you HP when you hit someone with it. Next is Mortal Skewer and it's good when you're getting flanked or targeted. Gun Deck gives you more maximum ammo and this is good because even with it you'll be reloading alot due to a low amount of ammo and how quickly you often use them. So if you hit one enemy while they are on the point with all broadside shots, your ammo is completely refilled, allowing you to basically have infinite spam ammo. Abyss Cannon Level 3 generates 3 ammo when you hit an enemy with one broadside. Abyss Cannon is so broken because it let's you constantly spam broadside. The 5 best in my opinion are Abyss Cannon, Gun Deck, Mortal Skewer, Plank Walker, and Blow The Man Down. This can be an enemy flanking you, targeting the enemies healer, or destroying a deployable. Finally the best situation for Harpoon is attacking one exact person. This includes firing at a contested payload, creating a wall of mortar to deny entrance of a very large area, predicting an enemies movements, and if you're using the Crow's Nest card, movement. The next best situation for mortar is for area denial. Some examples are when your team is moving the payload, when you are attacking someone that is very close to you, shooting off walls to get around shields or other obstacles, or when the enemy is moving around alot from a bit away. To begin I'll talk about the situations best for those attack types with the situation that is best for using the mortars is normally best against there is a moving enemy or to get around deployable shields. Dredge has 3 different types of attack, all of them for different situations along with unbelievably good cards and talents.

Dredge in my opinion has most potential out of nearly every paladin in the game currently.

Paladins dredge