Pros:
Good for solo queue
Good spilt push potencial
Good tf potencial
Cons:
No escape
Can't iniciate
Can't carry alone

You should wait for your level 3 to star trading with efficiency, your combo pre-6 is W-Q-E just E if needed to desigange as it consumes a hell lot of your precious mana !!. After-6 the champions tend to get more tanky, and remember you are a bruiser not an assasin : YOU CAN'T AND WON'T burst anyone unless they are pure paper. Keep doing the pre-6 combo, when you feel is ok or safe to kill start with your ultimate to get the bonus ap damage and slow. Your after-6 combo will be R-W(wait for your fish to come up keep hitting with your w to max the dam.)-Q-E use your E to do damage or juke the enemy if needed... Using this strategy you'll max your damage as you'll receive the ap bonus for each hit, and your fish will come up before the W effect worns off.

The way of the 4 (4 dorans blades) is the most efficient way to sustain-lane for bruising at long term. After the 4 dorans completed rush a sheen and then a phage closing the trinity at the end. Then if an enemy champ is snowballing the game make mr if the enemy champ is ap or armor if the enemy champ is ad. I recomend sunfire and spirit visage. If the enemy team is not extremely fed rush BORK. After BORK if you need to carry hard and your team doesn't have damage it's recomended to make a shiv and frozen mallet. If your adc/mid laner is fed then just go for tankiness

You are a bruiser but don't get cocky ! You can't jump on 5 at the same time, be an oppurtunist go for their adc without protection, their mid laner (people with few escape/cc and life). If you can't get oppenings create one with your ultimate, ulting on champions that are together makes them go apart just pick your target and go for it (always keep in mind YOU ARE NOT AN ASSASIN). In some situation the enemy team will be "camping" if no one can iniciate then do it yourself always focusing one target, if someone is better at iniciating then you wait for him to do it, your team fight starter potencial it's not good for you and your team.

Buy an elixir of ruin and go for split push, with your T.B.O.R.K combination plus the elixir towers will fall quickly. Do not understimate your split push potencial