You should always play the early game as agressive as possible cause you want to snowball so after stomp the botlane you just roam and win the other lanes by yourself

but how to stomp botlane?
well first i like to use my 2 charges of the item in the second wave so i surprise the enemy with level 2, when i hit lvl 2 i go in, sometimes i flash so he secure an early first blood, after that you push the lane so the enemy will probably lose the second wave while you recall and get a long sword or 2 of them (depending of who got the first blood)

now we should freeze so the enemy cant be really save, forcing them to trade and thats how we get more kills BUT if the enemy just dont trade we just positionate between the minions and them so they cant cs while our adc has the lane freezed, if we are lucky the enemy jungler will come botlane to gank, cause we are slowly pushing, most of the times that jungler will die or in the worst situation no one will die

after some time we will be too ahead from the enemy and we will have wards and umbral glaive, so we push a wave hard a possible, and then we eliminate every single ward that the enemy has, at this point our jungle should come botlane to dive, destroy the turret and then do drake

After That our adc is so strong so he can 1v2 in the botlane meanwhile we become a second jungles that goes to any lane to get kills and turrets ALWAYS warding the enemy jungle cause if we see him we just kill him and steal the jungle completly forcing him to gank or tax lanes (spoiler: he cant gank lanes cause he will die)

End the game as fast as possible cause pyke decays at 25 minutes cause he cant build more items (you are probably full build at 25 minutes)and thats what makes you strong.

lvl 2 Engage Combo
E+Flash+ Q into your adc and AA the enemy to death (dont forget to use ignite at the start of the combo preventing the healing
Basic combo
Q(ranged)+E+AA+AA+AA
Melee combo
Q(push)+E+AA+AA+AA
Large Stun combo (1)
E+Flash
Large Stun (2)
E+Ultimate (practice this one before using it in a ranked game)