I've taken a look at your setups, but am not sure what exactly you are looking for with the term 'aggressive'.
Give us a little explanation as to the details on what has happened in the past and what you would like to accomplish, including specifics on where (type of corners; entry, exit or both, etc.) you would like the car to be more aggressive.
Of course a quick way to accomplish what you've asked for in a general sense is to use a one-way up front. It will require taking some quality time to dial in a good base setup and learning how to drive as consistently fast as possible. The aggressive steering associated with a one-way will certainly force you to be more precise and smooth with your steering inputs. It will also magnify the effect on each aspect of steering (entry, mid and exit) for even the smallest setup changes.
You may end up more consistently quicker on most tracks with a two-diff or spool setup over the length of a race. However, going the one-way route is definitely a way to learn how to fine tune chassis setup and also drive smoother and faster with any setup.
