Paladin Skills, Levels 23 - 40
Armor Break is level 23, requires l evel 2 Shin Breaker, costs 10 SP to learn and 4 to level. It's a fast and spammable attack that lowers defenses on top of being damaging. This is a Paladin must-have. Ranks increase the damage and defense reduction, guaranteeing any points here are well spent.
Aerial Block is another level 23 skill, requires Stance of Faith level 2, costs 8 SP, and 3 to level. Essentially a second Aerial Evasion, only it gives you a chance to block attacks while in midair. It has a cooldown, but it can be a life saver.
Charitable Zap is level 26, needs Sacred Hammering level 3, Righteous bolt level 1, and 10 SP to learn, with 4 SP to level. It'll electrocute enemies in front of you and, when their electrocution is about to wear off, it will discharge and hit everything around the effected enemies. Useful, especially as a prereq, but has a long cooldown.
Divine Vengeance is level 26 and needs level 2 Divine Ascension. 110 SP to learn, 4 to level. It's just like Divine Ascension, too. WIth Ascension you left-click to launch enemies once you block them. With Vengeance you right click to slam a shockwave in the ground to blast enemies away.
Shield Charge is level 29, needs Armor Break level 3, costs 10 SP to learn and 4 to level. Basically, you dash charge through enemy mobs, dealing damage with your shield along the way and taking 50% less damage while you do so. It is great for charging through mobs trying to pin you, or chasing down enemies, or in general just using for damage.
Elemental Aura is level 29, 10 SP to learn, and 4 to level. It's a buff that raises your partys fire and ice damage and resistance. Given that you as a cleric use neither of those elements, it's only useful if you party with people who do. One interesting thing is the skill's nature. You toggle it on and it drains MP while active, and you can cancel it by casting again or a different aura.
Divine Punishment is levle 29, needs Aerial Block level 2, costs 10 SP to learn and 4 to level. Another defensive skill, this one is basically damage reflect. When you get hit, you hit the enemy back, automatically. The damage returned is calculated as if you had no armor or resistance, so with enough ranks you can be dealing a lot of damage with it.
Iron will is level 32 and requires Divine Punishment 1. 10 SP to learn, 4 to level. It's a buff that gives you 75% damage reduction for 12 seconds, at rank 1. It has a full minute cooldown, but it's great for getting out of tough situations.
Electric Smite is level 32, needs Charitable Zap level 3, 10 SP to learn, 4 to level. It's a melee attack where you jump forward and smash the ground and have lightning bolts rain down around you, sort of like a supercharged Righteous Strike. Great damage and useful for both subclasses of Paladin.
Conviction Aura is level 35, needs 10 SP to learn, and 4 to level. It's a buff that you toggle on and off, like Elemental Aura. It overwrites Elemental Aura, in fact, so you can only have one active at a time. It's useful in that it increases Light resistance and damage, which is directly beneficial for your skills. It's a lot of SP to learn though.
The God Within is level 40, requires Iron Will level 2, and costs 10 SP to learn. It's the defensive tree's ultimate skill. It raises your strength and int by 300% and your Vitality by 100%, movement speed by 50%, and deals magic damage to enemies in front of you when you use it. Not to mention, it makes you literally invincible. Unfortunately, it has a VERY long cooldown, at just over two minutes. Superbly useful.
Hammer of Divinity is the other level 40 skill, requires Electric Smite level 3, and costs 10 SP. It's the offensive tree ultimate. You summon a massive hammer and swing it, dealing physical and light elemental magic damage to a large area. Essentially a massive explosion of damage in front of you. Definitely useful.