Fizz leveling order?

Most of the time E > Q > W

E - Good for dodging skills and used as mobility plus waveclear
Q - Good single target damage
W - That truedamage

R>E>Q>W

E and W are your most powerful tools for early and mid game. Considering your ulti slows and your E slows on top of doing the most dmg out of all skills, you can squeeze in plenty of autoattacks where W does the magic. 2-3 W autoattacks do loads more dmg (+ dat real dmg ^) than Q on same lvl and usually u can always squeeze in that many while dueling...

max Q

E first, good waveclear and Nice dmg