Burst targets with Infernum in main hand and Severum in off hand. R Q W instantly one after another then Q.
Kite and deal damage from range with Crescendum in main hand and Calibrum in off hand. Q then instantly AA W. Continue to AA and kite until your sentry dies then Q R instantly and AA twice.
To AoE root use Infernum in main hand and Gravitum in off hand. Q then W Q W as quickly as possible followed by an AA.
Engage teamfights with Gravitum in main hand and Calibrum in off hand. R and Q once it lands, then instantly W Q followed by two AA's.
Quickly stack Chakrums by using Crescendum in main hand and Severum in off hand. R then instantly W Q. Once it's done it's channel, W and AA
With Calibrum in main hand and Gravitum in off hand you can root from very far away. Use Q then instantly W. AA once the Q lands then Q with Gravitum, then use W to swap back for AA's.
To snipe with Calibrum out use Q and R instantly then AA twice.