Want your skills to become even stronger? Well, here is a guide on how to do that. No, you don't have to go to the Skill Master and buy new skills. You just have to have Skill Points (attained by leveling up). You use these Skill Points to increase your skill's power at its current level. Cool huh?
Click on the Skill Info icon and click on the Active icon (first icon) in the Skill menu that comes up. A list of all your active skills will be there. Click on the Skill Empower button at the bottom of the menu and a Skill Power menu will popup.
Click and drag one of your Active skills over to the empty slot at the top of the Skill Power menu. The name of the skill will appear in the space. Now here's the tricky part. The 4 icons below it are options that will upgrade your skill. Click the arrows to increase or decrease the upgrade.
When you apply the upgrades to the skill, colored dots will appear on the icon. Once the Skill Point reaches 0 (remove one of the upgrades by clicking on one of the down arrows to make the Skill Point go back to 1) and you are satisfied, click Complete. Your skills will now be upgraded.