Need Help Understanding Gold Tower Defence Upgrade System

[winel]

Hi everyone,

I’m a bit confused about the gold tower defence upgrade system. In gold tower defence, there are multiple paths for upgrading towers, but I can’t tell which ones are the best for different gold tower defence monsters.

Should I focus on power or attack speed first? Also, how does goldtowerdefence gold impact upgrade efficiency later on? Would appreciate some insights or guides on this.