Towers are a joke, Just tanked one for 16 minutes with a somewhat normal build
Using the new practice tool, I decided to see how long I could tank a tower using Galio. Before the removal of the laser on base towers, I could tank an inhibitor for about 50 seconds. I decided to try again with the practice tool because how easy it is to test things like this now. I tanked an inhibitor tower and minions from 44 minutes to 60 minutes when the game auto ends. At the end I had pretty much full HP and 1/4 mana left.
Whiile I don't mind being able to solo tank towers forever (without mana being a factor), it is kind of a joke that a base tower does so little damage.
My build was
which isn't out of the realm of possibility for a normal Galio build meaning I didn't build specifically to tank towers.
are the ones that come to mind.