Guild Wars 2

Can you treb Durios from SM third floor to counter treb them?

easily. you can treb QL from SM 3rd floor too.

You can treb durios walls to flip the tower in order to take it down. There is a shelter in durios if they put up trebs there, it’s impossible to take it down from stonemist. You can set up balistae from the back of durios to take it down however.

The problem is if there is a treb in sm 3rd floor and bunch of eles trying to protect it by using focus skill #4 (Swirl winds), it is impossible to take it down unless sm is flipped.