What wordpress caching plug-in do you recommend to use with the Activello theme?
Hey there
There is no any special caching plugin for this theme, you can use any caching plugin you think is better or if you used one before and it worked good for you, you are free to use any caching plugin 
Hi, I would like to know which caching plugin did you use ?
I tried a few but it did not work well for me, thank you.
Good evening
Caching plugin can play a big role if it’s well configured, also this depends on the project,
from my practice i use autoptimze: Autoptimize – WordPress plugin | WordPress.org or Wp super cache:
How To SETUP WordPress Super Cache Plugin 2017 - YouTube