Faster Engineering

"Increased efficiency allows the Engineer to produce sentries, foam and bloon traps more often."

- In-game description

 is the Tier 2 upgrade of Path 1 for the Engineer Monkey in Bloons TD 6. It increases the production speed of sentries from every 10.0s to every 6.0s. This allows up to 4-5 Sentries to be placed on the map at once per Engineer (5-6 Sentries with the "Vigilant Sentries" Monkey Knowledge upgrade), ignoring attack speed bonuses. This upgrade also increases the rate of producing Cleansing Foam and reduces cooldowns for new Bloon Traps. For these contraptions, their attack speed is increased by +66%, equivalent to an attack cooldown reduction of 40%.

It costs $340 on Easy, $400 on Medium, $430 on Hard, and $480 on Impoppable.

Summary
Faster Engineering improves the attack speed of Engineer's contraptions, more specifically sentries, Cleansing Foam globs, and generating new Bloon Traps. It increases the overall offensive power of the Engineer by a fair amount.

Tips

 * As Sentries no longer consume footprint, it should no longer be a problem to increase production speed of sentry-building without interrupting placement of other towers.
 * All alternate attacks are deployed at a +66% attack rate, and does not affect Engineer's main attack.
 * Note that Sentries still last for up to 25 seconds, unless the necessary MK is bought.
 * Cooldown for replacing a new trap remains capped at 2.8s. The bonus production speed for Traps applies only to the stockpiled traps within the Engineer; no traps in the stockpile leads to requiring extended time to make a new trap. Reducing that continuously running cooldown from 12s to 7.2s is most helpful for increasing rate of constantly filled traps.

Sounds
When a sentry is placed:
 * [gadget placement]
 * [gadget placement]

Trivia

 * The BTD5 version of this upgrade is named "Fast Engineering" without the "-er" suffix.
 * The Faster Engineering Engineer appears on the Bloons TD 6+ animated cover art. The monkey appears to be looking around to his left and upwards in a rather worried expression. His arms and feet move accordingly to the direction of vertical leviation.
 * Other monkeys included on the artwork include Sharp Shurikens, Ezili, and Arcane Spike.