Carry games through early game roaming/picks
Pressure the enemies jungle(especially vaults spawning at 8mins) as calico has very good escape, torment pulse spike is very helpful for jungle camps
Whenever ult is off cooldown you should be looking for a pick
Maxxing cat first allows for alot of staying power on the map, letting you pressure hyperscalers(e.g.seven)
Powerspike items are cold front, torment pulse, spirit snatch, artic blast and then scourge/escalting
Powerspike via ability upgrades: 4.2k(2nd upgrade of leaping slash=stronger trades), 6.6k(2nd upgrade of ult=better burst), 17k(max cat = perma map pressure).