In the strategy game Bloons Tower Defense 6 (BTD6), players must defend their base against waves of invading bloons (balloons) using a variety of towers. Fast Upgrades is a powerful ability that allows players to upgrade their towers much faster than normal, giving them a significant advantage. However, there are several strategies that can be used to beat players who are using Fast Upgrades.
One of the most important things to do is to focus on early game defense. Fast Upgrades can be very powerful in the early game, as they allow players to quickly upgrade their towers to deal with the weaker bloons. However, if you can survive the early game without losing too many lives, you will be in a much better position to defend against Fast Upgrades later on.