Fluffi's Champion Guide
General Info
Hi, I'm Fluffi, and you may see me in game most commonly as a Champion named Fluffibun! This is a guide for those who want to become a Champion, which is the Pure 3rd Job of the Bunny character. Being a Pure 3rd Job means that you get skills that you can only use if you go this route; if you became Hybrid 3rd Job, the Duellist, you would have access to Buffalo's 2nd Job skills instead.

Do I want to be a Champion?
Champions are basically the official bossers of Trickster. With good equips (and sometimes a Guardian with the right moves), they can 1HKO bosses. They can dish out the most damage compared to any other character. They also do very well in PvP. This is because Champion has many powerful, hard hitting single target moves. However, at the cost of these powerful moves, Champions only have ONE AoE skill that they receive, called Chi Release. Chi Release requires a TM level of 240, so grinding until this point is going to be very painful. Additionally, Chi Release also has a very small range, making it ineffective in maps that are not highly populated by monsters.
On top of this, being part of the Power class makes Bunnies very easy to play. You don't have to constantly use skills, you just click and auto attack if you're lazy/still getting used to playing. There's nothing fancy involved.
Pros:
Easy to Play - Bossing - PvP - Many hard hitting skills (No need to wait for cooldowns, just use a different one!)
Cons:
Almost non-existent PvE - Grinding is PAIN
Builds

The image you see above represents the different builds that you can make with a Bunny. Note that as Bunny is a power type, POWER will always have 4 growth points in it. What this picture represents is the amount of points that go into each stat every time you level up. 4 Points = 1 Level in that stat group. In the picture, there is a 1 in MAGIC. This means that a level 400 POWER character with this Point Allocation would have 400 levels in the Power stats (AC, AP, DX), and 100 levels in the Magic stats (MA, MP, MD). If this sounds confusing, it'll make more sense when you play. Aside from Power (as this is a Power character), you can change the stats point allocation, but be aware that you only have 3 points that can be allocated in total across the other class stats, as every stat aside from your character's class must have at least 1. So you could never have 4 in Power, Magic, Sense, and Charm all at once.
You'll often see people refer to builds saying things like: 4123
They are talking about having 4 in Power, 1 in Magic, 2 in Sense, and 3 in Charm (refer to picture). As a Power user, NEVER PUT POINTS INTO MAGIC.
Recommended Builds:
4114 - Great survivability. You are going to be a TANK. But, at the same time your LK and WT (DA is mostly useless as it is usually for drilling, and CoraTO has Driller Pets) is going to be low. This means you won't have the WT to carry a lot of pots/quest items (and as you progress, quest items get heavier and heavier), and you miss out on doing a lot of CRITS with the LK stat that would give you better damage. With good equips, the lack of CRITS won't be as bad. This is the build I use. Recommended for beginners.
4123 - Decent survivability. You won't be as tanky as above, but you get some extra LK and have more WT for pots and items. Recommended for beginners.
4132 - Trading tank for damage basically. You're going to be very squishy and easy to kill, and will need decent equips to take hits, but hey, you're going to land more CRITS.
4141 - The glass cannon build. You are going to be defenceless as hell, but get a ton of CRITS in return. If you have some good gear, comped and levelled, you'll be able to hold your own, but otherwise? Prepare to die. I wouldn't recommend this build for newer players.
Any build you choose, I recommend putting all points into AP. This will give you maximum damage. Your AC stat is going to be high anyway, as it will level up as you do, and there's skills to increase it if needed, and DX maxes out on its own eventually.

First Job (Schoolgirl)
Please note: I recommend getting all of these skills to at LEAST level 10. It's up to you what you put points in first, but remember that, especially as you go, many skills will require at least level 10 in a previous skill before they can be learned.
Here are the skills that I recommend:
Steel Punch - This is the default skill you get as a Bunny. Use this skill until you get Burning Rave.
Burning Rave - I would suggest this skill over Shockwave, because it does better damage. Save some TM points, considering it only requires level 20 TM, which you can easily get to on this server while using Steel Punch or just attacking normally.
Pumping Heart - This is an AP buff that increases yours and your parties AP. Good for even if you aren't even in a party. More AP is always useful, isn't it?
Bull's Eye - This is an AC buff. In the beginning, considering how fast you are able to level, it's not really useful enough to be putting it on all the time. As the monsters get higher stats, and you have more multi-hit skills, it will become more useful. I only mention it now, because it is a prerequisite for Upper Smash.
Upper Smash - The next hard-hitting skill after Burning Rave. Either use it to replace Burning Rave, or use it in conjunction if you don't like waiting for cooldowns.
Hyper Beat - This is a prerequisite skill for Guard, which Bunny can learn in 2nd job. Otherwise it's not too useful, as DX maxes out on it's own eventually.
Most of the other Bunny 1st Job skills I did not mention are debuffs, which are skills you will use in specific situations, such as bossing and PvP. Use them at your own discretion. Note: Tornado Bomb does a set amount of damage which may be useful when low levelled, but absolutely pointless after a certain level.

Second Job (Boxer)
Please note: I recommend getting all of these skills to at LEAST level 10. It's up to you what you put points in first, but remember that, especially as you go, many skills will require at least level 10 in a previous skill before they can be learned.
Here are the skills that I recommend:
Uppercut - Your next strong 1-hit attack. It will do even more damage once you get Counter Punch.
Counter Punch - A passive skill that increases the damage done by Uppercut. Just learn it and get more damage without even having to cast!
Quad Punch - A 4-hit attack that does great damage.
Tetra Punch - This is the most powerful skill that a Bunny can have. It strikes 4 times, with each hit being stronger than the last. If all 4 hits land, you will do MASSIVE damage.
Guard - This skill 100% blocks Physical/Gun moves. The more you level it up, the more blocks you will get, with the max being 5. This means that 5 hits from Physical/Gun moves will not land, and you won't get hurt. This is especially useful for running through Koi/Kro maps, maps where you're under-leveled with hard hitting monsters, and PvP.
As I said in the intro, Bunny has many hard-hitting single-target attacks. You get most of them in this job, in fact, you'll be using these even once you're a Champion. I would suggest keeping all of these attacks in your hot-bar, allowing you to still do heavy damage while the others cooldown.
Most of the other Bunny 2nd job skills that I did not mention are buffs that are more useful in specific situations than overall, such as Desperate Rally, which only provides a buff if below 20% health. I'm not one who would purposely stay that low just for an AP buff, but you do you.

Third Job (Champion)
Here are the skills that I recommend:
Adrenaline - This is another AP buff, which can be stacked with Pumping Heart. Do even MOAR damage.
Flaming Fist - This is a powerful skill to use IF you have Fire Attribute on your character (comped onto your equipment). If you don't have Fire Attribute, it's not as useful, so that's something to keep in mind. This is also a prerequisite for Chi Release, it must be mastered, so even if you don't have Fire Attribute I still recommend getting this so you can have access to the only Champion AoE skill.
Chi Release - This is Champion's ONLY AoE skill. Mastered, it can hit up to 6 enemies, HOWEVER, the range for this skill is very small, so you'd better hope you're close enough for all 6 to utilize the max potential. Nevertheless, if you want to grind as a Champion, this skill will be your best friend.
Notes
This in not the be-all end-all way to play as a Champion, it's just based off of my experience playing one. Maybe I included or didn't include things that you agree or don't agree with. That's fine! I encourage you to mix it up! Have fun with it! I made this guide just hoping that it might help a few people.