During laning Phase try to bully melee champions as much as possible and push the wave to entice a jungler to gank. When this happens switch to the jungler as he won't know how much damage you deal and kill him first, then kill or force back your laner.

If you are against a ranged matchup build either a spectre's cowl or bramble vest and play defensively. Once you have a phage and respective defensive item with tier 1 boots you can try to kill your laner

In team fights try to get to 5 stacks on passive on a squishy target and ult them to initiate the chain reaction. Do this until you have gotten a pentakill. If this is impossible then just peel for your carry and distract back line

Split pushing on Darius is good and encouraged. If you know 4 are bot whjy wouldn't you get top turret and inhib?