I have a spellbreaker with ABB in the LMB of my mouse so that every three seconds i will be able to activate it. Even if its in cooldown, I am still able to attack enemies but it looks like its only a default weapon attack.
Can this default weapon attack activate skills such as Belgothian’s Shears or Execution?
That’s correct. ABB cannot proc any WPS. It is not a default weapon attack. There are a few skills that are considered default weapon attacks, like Cadence, Fire strike, and Savagery. There is also a few items which give players a default weapon attack. They all mention it in their description.
ABB as your LMB attack is nice because you can just hold down the button instead of having to refresh Lethal Assault every few seconds which is a PITA.
The downside is that you lose out on the extra weapon damage a default attack replacer gives you which you really want for a top DPS attack build like that, so for that reason it’s worthwhile to get a replacer even if it’s somewhat clunky.