The result is a semi-functional slaughtering of bots, although having to constantly open the command prompt to paste and submit the -refresh command gets annoying after a while; sadly, there doesn't seem to be a way to disable the bots' fortify spam. After a little bit of this, I noticed that the cooldown of the metaphorical bowling ball and the travel time were not that far apart, leading me to wonder if I could play this game successfully without having to spam cheat commands (and reset the fortify cooldown) all game long. Thus "Ancient Apparition Bowling" was born.
Your goal is now to destroy the bots' ancient before the bots level up enough to tank through your ult and push your base. This is more difficult than it sounds, as the bots are actually rather crafty and level up sooner than you might expect.
It is difficult to push all lanes at once, since the bots can quickly respawn at lower levels, and you only have so many ultimates to shoot off. It would thus seem prudent to choose a particular lane to hammer, but how to do so isn't actually obvious.
The strategy that I tried was to focus the enemy creeps at their spawning point in a side lane. This can be done by firing consistently at the 18 and 48 second marks towards the front of their 3rd tower. This will obliterate all of the creeps during the early part of the game. Make sure to adjust your ultimate slightly to the left each time in order to adjust for the micro-delay between your ult going off cooldown and actually launching your ult; you can reset this after a while with a Refresher Orb.
Though this may at first seem like a good way to get the creeps to push the tower, the bots are actually crafty enough to pull the creeps behind the tower, limiting the amount of damage done. While I was able to eventually push to their barracks, at this point the other bots also helped pull the creeps behind the barracks, and eventually became strong enough to tank the ult and push my base, thus making this a losing strategy.
A possible variation would be to try focusing down the bots themselves, but this is tricky as they often move out of the ult's way. A hybrid combination may involve finding a position where the bots and creeps are likely to align, then aiming to kill the creeps and probably the bots. It may also be easier to push straight up middle rather than taking out a side lane first, especially as the bots seem found of charging up mid.
I've yet to win at this metagame. It might not even be plausible. Try it yourself and see what happens!