Map: Alchemical Laboratory
Safest Survival Build
Build Status: Public
Game Mode: Survival
AFK Able: No
XP Per Run: 29 Million
Time Per Run: 3 Hours
Mana to Upgrade:
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For the first wave build the center rear DST and the Overclocker, and a single explosive trap on the left or right rear entrance. Some intervention is required for the first or second wave but the defenses will do all the heavy lifting from there.
Face the DST in diagonally intersecting firing lines, this slightly increases their effective firing width and also protects neighboring turrets more effectively from spiders. Aim the left most portion of the firing width at the column the wall is next to.
The main strategy is to just travel around and repair everything as it's damaged.
The explosive / poison trap setup is crucial, it keeps the smaller minions at bay so they damage the walls less and groups them up so it takes less explosive uses to kill them since it's more of a burst than a drip feed of enemies.
The Overclocker has to be placed carefully or you'll waste build points but you can just go for the full 6. These 2 extra points can be used for the Monk's healing aura which can help supplement mistakes, or getting knocked off the boiler.
You should be able to build everything by the end of wave 3, and upgrade everything to max by wave 17.
Once you grind the campaign version on Hardcore/Rifted a few times you should have good enough gear to run this pretty far or maybe even beat it, sp the stats listed aren't hard requirements, just where it's easy to grind once you have good enough gear.
On the boss fight it's important to start on the side [Hint 1] before moving to the middle [Hint 2], that way his fire line attack doesn't hurt the Apprentice walls in the middle. The point of those walls is two-fold, it keeps the core from being damaged if something squeezes through the wall which happens rarely, and it keeps the boss occupied if you happen to die.