No problem!
Well, I would suggest either the fire class or the water class c;
fun classes to play with
earth and wind are harder to form teams with
you c*so change to a different class again at lvl 66, 72 and 78 which allow you to unlock all of the classes
for lightning, you just need to have a good team, although defense/resistance/lp are his weaknesses, lightning is definitely the class that causes the highest damage, so you just have to defeat your enemies fast before they can get to you;P