build your beam on the railing next to the crystal for the elevation, makes line of sight better
wave 23 you have up to 7 chests to open, 24 onwards is just 4 per wave. I open up all 7 once bt then dont bother with later waves
worse quality than royal gardens, slightly slower. but lets you farm Dark Bots (ok dps pets) and Baby Goblin Mechs (solid DPS pets) at the same time for ~3% worse quality armor
I have all 4 summoners out at all time for better loot