Here is a Good short guide for Bladers of Karos. For Bladers there are 2 Fletta Attributes to consider. A blader needs speed, increased attack speed to take its opponents down. This is because it does not have a particular AOE skill and simply because it needs to kill quickly and move to the next target. Upon maxing your Air Fletta, you will get 24% attack speed increase, along with that you will also posses the Windcutter fletta skill.
If we remember correctly the way to calculate the damage with increased attack speed is like this. If your average damage on a mob is for e.g: 250 dmg. Due to the maxed air fletta, your overall dmg will be 310. The formula works like this: 250(avg dmg) / (divided by 100) 24% (attackspeed) 60 dmg. So you get an additional 60 dmg on top of the regular 250dmg, totaling 310dmg. On top of that, you also get the windcutter damage. Classes with low HP (karos online carat) and low DEF.
With the Fire Fletta attribute, Bladers get increased 5 Physical attack increase. Along with the possession of Fireball Without going into further detail and philosophizing about the various elements we will just state: Fire and Air Fletta are more suitable for Blader classes. We provide karos gold for you.