Rondo is very much the key to good Celtics offense. The two main determinants that should influence his offensive style are team matchups and in-game timing.
Against a team such as the Lakers, it's clear that Rondo will almost have to feel obligated to penetrate as much as possible. He'll be playing against the ancient remains of D Fish....and if Kobe trys to be the roaming defensive quarterback, he'll be drained of energy on the offensive end...all good. This type of game will often result in a high amount of assists by way of kickouts to KG, Perk Ray and Paul.
Against teams with lesser defense, Rondo will simply drive for the easy layup or open shot.
Against an Atlanta, Rondo needs beat them at their own game, and just run the ball on fast breaks. This will not be possible until he has a backup...then he'll get the rest he needs...and the energy to run much of the game.
As for in game timing, I've been noticing that Rondo has been more aggressive on the assists relatively later in games. I think he should instead try to establish the other guys first. He should still penetrate, but kick out....that way he surveys the defense without getting his layups blocked early on. He also establishes a rythym for the team...so they know who is hot or not. This will preserve his energy for later offensive domination, hopefully and especially for the fourth quarter. He seems to have a knack for making 4th quarter penetration tear drops....and besides, the Pierce iso's (with the exception of yesteerday) don't work well anymore late.
This way, instead of opponents feeling as if the Celtics offense retreats to conservative iso's and 3 pointers, they will feel more like they are attacked and penetrated...aggressivly and scarily...Rondo can do this...he is the key. We need the Celtics to be AGGRESSIVE in the 4th, not meek. If we are lucky enough to have Pierce be hot, this may be besides the point...but in the eventual case that this does not happen, Rondo should lead the charge.