Combo Mode After completing the level 10 class up quests, you obtain combo mode. Combo mode allows you to execute skills quicker than normal and deal a greater amount of damage as well. Make sure that your cool down times are low enough for your skills so that you may keep a continuous flow of combo. Here is how the combo meter works.
First of all, this is what your meter looks like as soon as you initiate combo.
In combo, there are a few levels of combo success. Miss, Good, Great, and Excellent. The better your timing, the more damage you deal.
Let's start with the miss scenarios
[///.......................|............|.......] Pressing too early or [//////////////////////|//////////|//////] Pressing too late.
Good scenarios
[...|............|........] Pressing somewhere near the first bar or [/////////////////////|///////////|////...] Pressing slightly too far after the second bar.
Great scenarios
[/////////////////////|////////...|........] Pressing somewhere near the second bar or [/////////////////////|///////////|//.....] Pressing just after the second bar.
Excellent scenario
[/////////////////////|//////////|........] Pressing right on the second bar.
Also, as your combo counter increases, the range of success shrinks and the speed at which the meter fills increases.
1-5 Combo [...............................|...........|...... .] Fills to full in .5 seconds. (All times are approximate).
6-10 Combo [........................................|.....|... .] Fills to full in .35 seconds.
11-Infinity Combo [.............................................|..|. .] Fills to full in .25 seconds.