When playing a pub team game, I never go full on team build, but know I should do something. As an int lover, I have found this build works great...
Siren (if you are more independent) or Shadow essence (more team geared)
Chain heal
Stun Field
Acid Rain
ult isnt important
Obviously you level acid rain as much as possible, put 1 point into stun field, to interrupt channels.
Other than that, I am not going to go into details for this build, I dont want everyone to copy me 100%. Mix up the defensive and ult, and find your own item build. This works great in team games, and allows you to be independent if needed.