Poplust

"Boosts attack speed and pierce for all Druids in the radius. Can stack up to 5 times on a single Druid."

- In-game description

 is the fourth upgrade of Path 3 for the Druid in Bloons TD 6. It provides a 15% attack speed and pierce buff to all other Druids in its radius, stacking up to 5 times additively (75% increased attack speed and pierce). Poplust also stacks multiplicatively with Heart of Vengeance and Druid of Wrath, up to a maximum bonus of 7x.

It costs $2,125 on Easy, $2,500 on Medium, $2,700 on Hard, and $3,000 on Impoppable.

Summary
A group of 6 or more (since they can't buff themselves) Poplust Druids with Thorn Swarm can dish out a lot of damage in combination with previous upgrades, and are especially proficient at thinning out tight Bloon rushes. Poplust can also boost a Superstorm Druid, greatly increasing the rate at which the tower fires all of its powerful projectiles. When deployed with a level 18 Obyn Greenfoot, all Druids of Wrath begin the round with 200 pops which effectively doubles their base attack speed. This is further improved with Obyn's boosts to Druids at level 2 and Magic Monkeys at level 11; increasing their range and pierce. All the Druids can also be boosted by Alchemist's Berserker Brew and Stronger Stimulant with increased attack speed, range, pierce and damage; with eight thorns each dealing more than two layers of damage, the tower is able to dish out a significant amount of damage quickly and consistently.

Alternatively, the player may opt to follow the top path. Heart of Thunder is affected by the attack speed buffs, providing incredible popping power but less layer damage potential.

Tips

 * Poplust should be paired with other Druids in order to make the most of the buff. Unlike Shinobi Tactics, Poplust cannot buff itself.
 * The best crosspath for Poplust should be taken from what would be the best for Druid of Wrath.
 * Similar to Shinobi Tactics, as long as that tower is a Druid, it will be affected by the attack speed buff regardless of whether it is a Poplust or not. This means, for example, a 4-2-0 or a 0-5-1 will also be affected because that base tower is a Druid.

Trivia

 * "Poplust" is a reference to the term "bloodlust".
 * This upgrade is very similar to Shinobi Tactics in that it buffs the pierce and attack speed of all of the same monkeys of its kind (Poplust can only buff other Druids and Shinobi Tactics can only buff other Ninja Monkeys).
 * Unlike Poplust, Shinobi Tactics can buff itself and stacks 20 times.