Tinkerer

Overview

 * The last 3 towers you have built deal 30% more damage.
 * Stacks additively with Amp Spires.
 * Available to players with the Road to Elysion DLC at Rank 22
 * Building any number of support towers after the three most recently built damage dealing towers doesn't remove the perk's damage bonus from the latter.

Notes & tactics

 * Technically the most comfortable towers for this perk appear the Focus, ACP & Gatling, these are among the ones, most potent as all-around ones when overcharged. Very often the Drone and the Anti-air can be utilized fine as well, since they are usually fine if being one or just 2-3 per map and receiving simple overcharge as well. The other towers mostly behave in a different way and often might be preferrable as being more than 3 in total and other perks might be preferrable.
 * If a coop partner deconstructs one of the three damage dealing towers, there will remain only two towers that keep benefitting from the perk. In that case you have to build another damage dealing tower to raise the total number of your towers affected by the perk back from 2 to 3.
 * This perk doesn't affect (increase) the damage bonus added by an Amp Spire. However, this perk does increase the damage bonus from overcharging any of the three towers. In other words, it multiplies by 1.30 towers' own damage, including the part of the damage added by overcharging, but doesn't multiply the damage added by an Amp Spire, which is calculated on the towers' own damage independenlty of this perk. Another way of saying this is that it stacks additively with Amp Spires, just like all other tower damage increasing perks with the sole exception of Synergy.
 * A potentially good pick on most scenarious, although it tends to lose its purpose if 4 or more types of towers/a bigger overall count are needed, e.g. it is good when the game can be played with just ACP, Focus +/- Anti-air/Drone, but is not as viable if there is a big stacking of towers or if there is a sharper need of random damage-tower types.
 * It doesn't affect preset towers or ones, built from other players. The player (builder) has to build the three towers from scratch.