(sorry for the low ress, i have a weak pc)

-Try to alternate your autos between the turret and other target, you'll keep the W active for longer and destroy faster -use the same method as if you would dive level 3 -hard push the first wave -don't hit the second -as soon as the 3 meeles die, defend the casters and hard clear the canoon wave -protect your minion wave

After the 1st tower, the second is tricky, i have no strategy because it depends on how the bots will react, sometimes your team comes all mid, sometimes you end up in a 2v5, so just try to keep your minion wave big so you can take the 2nd tower.

-After you have anough gold for Essence Reaver die (try to make it trade kill for extra atk speed itens) (recalling is too long, use ghost to get back to lane)

before you take on the nexus turrets, clear the wave and the bots with your ult and alternate your hits between the 2 turrets, clear the remaining minions with your skills so your wave can help you (If you look at my bots, they ignored the nexus so if you get lucky and they help you, it might save 5 to 8 seconds)