Towers will most likely have a Tier 5 in BTD6, they need to keep it interesting. But, I have also compromised a new plan. I call it the Tier Split Strategy. Towers still have two paths, but upon reaching either T4 upgrade, you can take the normal route (Like Triple Darts to SMFC), or a secondary Tier 5 accessible from both paths, but depending on if you took the left or right Tier 3, it will do something different and unique. EXAMPLE: Dart Monkey's Split Tier 5- Dart Stream (IDK, not going to be the actual thing). Lets say this increased his fire rate to a Super Monkey.