one LT has been replaced with a gas trap and additional reflection beams
the layout of the reflection beams has been slightly adjusted
more mage minions
The listed stats are what I was using at the time of writing this description. You can certainly run this map with lower stats, but it might require a bit more active play.
Use a booster summoner on the LT stack (huntress + monk guardian).
I can currently AFK this build at least up to and including wave 30. After that, the northernmost mage minion and the two southernmost archers might require a bit of attention during the first third of each wave depending on your stats.
In my experience, starting somewhere around wave 15-18 and restarting as soon as you hit wave 29-31 tends to net the highest amount of ults/hour.