The standard combo of Blitzcrank is Rocket Grab -> Power Fist -> Static Field. However sometimes its better to Power Fist -> Static Field, and use rocket grab on the very edge when your enemy tries to get away. when on bottom with a ranged AD champion i still wouldnt choose Clairvoyence because you will need your exhaust for when the enemy tries to turretdive you or when u grab the enemy champion under turret. In teamfights try to hit enemy ad carries with your power fist as much as u can it cost almost no mana and it will greatly reduce damage done to your team. When chasing an enemy with allies try to wait with grab until the reach a corner and grab just so when the turn to the side u will have them. (the reach of the Rocket Grab is just a bit further than the arrow tells u) furthermore as Blitzcrank u DONT want any kills. give them all to the ally AD carry u are feeding. Good Hunting

St Petrus