Towers have special roles to play for. Webin bloons td 6, it is important to choose the best crosspathing for a specific tower in order to receive the best benefits out of that tower type. Webmiddle path is very useful if you know how to use it and it's definitely my favourite but if you want just put tower down and win than to path is my recommendation.

The sentry gun isn’t very good by itself, but with other towers. Webtop path engineer is a’lot of things, mostly popping power, but lets start with the basic upgrades. If you are running top path with it i would highly suggest. Top path farming and catching leaks: Probably middle path big damage:

Probably middle path big damage: