I've been able to clear this map with about a 95% success rate using this build. It requires at least one ranged DPS hero to kill the bosses. The map can also be comfortably soloed in 4-player split-screen.
Build Order
The first Build Phase is fairly tight, leaving around 25 seconds to spare. During this phase, build everything except the Owl Nests, the Healing Aura, and the Empowering Shrine.
During the first combat wave, start at the North Core and upgrade the Buff Beam as quickly as possible. Then move to the Center Core and do the same, finishing at the South Core. Spend the rest of the wave upgrading your defenses.
During the second Build Phase, place the remaining defenses that were skipped during the first build.
After that, continue upgrading from North to South. With an Adept, you should be able to finish upgrading everything within two waves.
North Core
The Buff Beam is placed on the edge of the rooftop behind the Crystal Core. The auras should be centered on top of the gargoyle's head.
Very rarely, a spider spawning in front of the Golem can survive long enough to web the cannons. If this becomes an issue, you can reduce the Web Wall at the Center Core from 3 DU to 2 DU and use the saved DU to place an additional Reflect Beam protecting these cannons.
Center Core
This section is very straightforward. Just make sure the cannons are placed at the end of the Buff Beam closest to the Crystal Core so they have the proper angle to cover every spawn.
South Core
The only important detail here is making sure all auras are buffed by the Buff Beam, which should be placed on the bridge between the platform and the spawn point.
Important Notes
Reflect Beams are extremely important. Without them, spiders can web your defenses, causing them to stop attacking. Most of the time this quickly snowballs into chaos and can easily result in a failed run.
Boss Fight
For the boss fight, I prefer staying at the North Core, although you can place the Healing Aura and Empowering Shrine at whichever Core you find most comfortable.
Make sure your Hero Boost Monk stays far enough away from your DPS hero so they don't stack the boss debuffs, while keeping both heroes inside the Empowering Shrine and, if possible, within the Golem's buff area.
For DPS, I personally use a Gunwitch equipped with a Forest Rifle.
Hint focus
Click on a numbered hint marker on the map to zoom and highlight nearby towers. Double click on map to reset zoom.
I've been able to clear this map with about a 95% success rate using this build. It requires at least one ranged DPS hero to kill the bosses. The map can also be comfortably soloed in 4-player split-screen.
Build Order
The first Build Phase is fairly tight, leaving around 25 seconds to spare. During this phase, build everything except the Owl Nests, the Healing Aura, and the Empowering Shrine.
During the first combat wave, start at the North Core and upgrade the Buff Beam as quickly as possible. Then move to the Center Core and do the same, finishing at the South Core. Spend the rest of the wave upgrading your defenses.
During the second Build Phase, place the remaining defenses that were skipped during the first build.
After that, continue upgrading from North to South. With an Adept, you should be able to finish upgrading everything within two waves.
North Core
The Buff Beam is placed on the edge of the rooftop behind the Crystal Core. The auras should be centered on top of the gargoyle's head.
Very rarely, a spider spawning in front of the Golem can survive long enough to web the cannons. If this becomes an issue, you can reduce the Web Wall at the Center Core from 3 DU to 2 DU and use the saved DU to place an additional Reflect Beam protecting these cannons.
Center Core
This section is very straightforward. Just make sure the cannons are placed at the end of the Buff Beam closest to the Crystal Core so they have the proper angle to cover every spawn.
South Core
The only important detail here is making sure all auras are buffed by the Buff Beam, which should be placed on the bridge between the platform and the spawn point.
Important Notes
Reflect Beams are extremely important. Without them, spiders can web your defenses, causing them to stop attacking. Most of the time this quickly snowballs into chaos and can easily result in a failed run.
Boss Fight
For the boss fight, I prefer staying at the North Core, although you can place the Healing Aura and Empowering Shrine at whichever Core you find most comfortable.
Make sure your Hero Boost Monk stays far enough away from your DPS hero so they don't stack the boss debuffs, while keeping both heroes inside the Empowering Shrine and, if possible, within the Golem's buff area.
For DPS, I personally use a Gunwitch equipped with a Forest Rifle.