AD Fizz is not the strongest top laner out there, do not consider this a strong champion for ranked since he does not prestige late game, without snowball, as the other top lane bruisers do. This is more of an early game build, can work late game if snowballed.

Pros

Strong damage early and mid game

Easy escape with E

Good at taking out their carry

Cons

Falls of late game compared to other top lane champions

Without E very vulnerable

If harrased and denied farm early can become very weak

For the largest damage output start the assault with your R, due to the passive effect of increasing damage to the target by 20% (does not affect ultimates damage), during this time start with activing Seastone Trident, close the gap with either your E or your Q, continue auto attacking and closing the gap with Q, save E if its needed to get out.