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I'll explain the use of each just in case someone doesn't understand what each is for.

STR - Adds strength to weapons. Basically, the more the damage.
STA - Increases HP and FP. Also, your defense is increased.
DEX - Increases attack speed, evasion rate, critical rate, and block rate.
INT - Increases MP and DEF against Magic.

Mercenary going STA Knight
STR and STA are your best friends, but STA is your closer friend. You're basically a tanker (one who takes the damage). You might even go all STA if you wish, but it's best to go with a partner who can kill fast, seeing as it'll take you some time to kill. You'll probably be a skill spammer because of your low DEX and high FP. DEX and INT are not to be bothered with.

Mercenary going STR Knight
Same as STA knight, but STR is now your closer friend. You'll do great DMG and with enough STA, can take hits pretty well, seeing as most knights have great DEF. If you're going full STR, be sure to have a ringmaster by your side, or an assist. They can heal you due to your lack of HP.

Mercenary going STR Blade
STR and DEX with STR overpowering DEX. However, seeing as a blade build is focued mainly on DEX, you need at least a few DEX to ensure great speed. I say cap it at 40-60. STR the rest. Maybe some STA to ensure survival. Again, no INT.

Mercenary going DEX Blade
DEX. Lots and lots of DEX. Add STR too. That's basically it. STA at 30-40 to ensure survival if a random monster pops up out of nowhere and hits you.

Mercenary going Aoe Knight/Blade
AoE rs are mostly skill spammers. Have enough FP. Have enough STA to be able to take monsters coming at you 5 at a time. Have enough STR to ensure great DMG. That's it.

Mercenary going INT Blade/Knight

One of the most stupidest build I've ever heard. We don't even need INT. It doesn't help us. Some do this to believe that they have more DEF against magic attacks from mages. Well, I suppose, but results haven't been shown yet.

That's about it for stats. If you ever need real Stat numbers, just PM me and I'll tell you.

As for the skills:
-Max Splmash and Keenwheel.
-Master Smite Axe and Axe Mastery or Blazing Sword and Sword mastery. --Get Pan barrier if you wish to challenge acrobats/rangers.
-Get sneaker for gianting.
-Get gullotine to go against Dark Illusion from acrobats.
-Reflex hit is bugged. Don't know if it's fixed yet.
The rest are pretty much useless skills that won't ever help you what so ever. Some might look cool, but you'll just be wasting skill points. For example:
-Protection can only add 20 DEF max, which is pointless.
-Blindside when maxed hits less than keenwheel when not maxed
-Impower weapon only adds to elemental weapons. Have fun Upgrading every weapon you own if you ever max that.

And such and such.
xD
Feel free to add suggestions or comments. If I made a mistake, tell me and I'll fix it.

Stupending: "They have to at least use SOME points in attacking skills if they want decent lvling. Trust me, lvling with maxed splmash and keenwheel is much faster. It's even better in PvP. I read everything about it from the real flyff forums and from own experience. Also, for sneaker, I never said it was ONLY for gianting now, did I? I just said that sneaker for gianting is good."

Well, I'm talking about going knight. Sure, those going blade can add on DEX because they don't really need these skills. I'm only using skills so that I can add more on STA and STR. Of course, it depends what others like. Also, for the FP, the FP pots aren't that expensive. 99 of them costs less than 15k. Along with the green sets and stuff, speed and crit increases, so DEX isn't needed that much. Again, it all depends on which class one is going to be. You don't really want a merc going knight add ALL DEX right? If you want me to change the guide so that I specify which skill points to use for going into each class, I'll do that.

True, but only in the lower levels. In the higher lvls, just by doing quests, 15k is almost nothing.

xD int blades and knights

I was a noob when i made my first char and gave myself 20 int.... (+5)