Let me put this in context since the ambush system is pretty interesting. The core of it revolves around the ambush skill, which kicks in when you manage to land a solid sneak attack giving you a sweet attack boost for half a minute. We're talking about +5% at level 1 and it goes up to +15% if you max it out, which is definitely worth considering for your build.

The fun part is figuring out how to actually pull off these sneak attacks since monsters aren't exactly blind. Youll want to break line of sight using the terrain around you, and theres some really helpful gear like the ghillie mantle that makes sneaking around much easier. If youre trying to build around this playstyle, look into getting some nerscylla or xu wu armor pieces since they come with the ambush skill built in and you can always slot in some ambush jewels or grab the descent charm to boost it further.

Just keep in mind that while its super satisfying to pop out of nowhere and slam a monster, they tend to wise up pretty quick after the first ambush. Its not like you can keep vanishing and reappearing like some quantum physics experiment but thats what makes timing your ambush really important. Maybe interesting: try to save your big ambush for when the monster is vulnerable or when your team needs that extra damage boost the most.