There's no good reason to keep Sweeper after level 9. Let's change that :3
Currently, the Sweeping Lens is pretty useless once you hit level 9 and can upgrade to the Oracle Alteration. While this really isn't a problem because you just go back and upgrade it, this isn't the same as your other option pre-9; the Warding Totem. The Totem remains relevant throughout the game and is recommended to keep a few.
My suggestion is to update the Sweeping Lens at level 9, and is as follows;
- ##Upon reaching level 9, the Sweeping Lens can be directed to move slowly by reactivating it.
Think of Viktor's Ult, and that's how it works (except it isn't stopped by terrain). It would move slowly so can't cover as much area as the Oracle's Alteration, but it'd be safer to use. If it seems too strong for its safety, I'd suggest the sweeping area shrink the further you move it.
Thoughts?
grants true sight of the designated area.