I've been trying Ferry recently with her three styles and I think Essence is my favorite(surprisingly cause I loathed it in the base game lol). I think it has the most damage, although her SBA generation is at the gutter compared to onslaught probably due to the remnance of the nerf from the base game so don't expect to do SBA spam Ferry.

Core sigils to the build are Stout heart(on firedrake summon for slot effeciency), Steel nerve, and Stronghold. Other slots are your preference.

I didn't have warpath here. I just focused on consistency than DPS and I decided not to use it since it doesn't have 100% uptime unless use a CD focus build or you're beating barrold.

The style's main gameplay loop is initially reach 9 Stacks of Loving Trust then maintain it there. The stack refreshes after you lose a pet so you need to manage it. There are two ways to lose a pet, to let it disappear or to use onslaught. What I do is that I make sure I have a pet summoned at least a few seconds after the last one disappears. This ensures the pet automatically disappears before the 9 stack timers run out. If you missed the timing to summon though make sure to summon then use onslaught to refresh it, going down to 0 stacks is a hassle.

The skills I used honestly aren't optimal I don't use these on a real quest. You can choose any skills you want, but make sure you think of the quest rather than dealing DPS. Imo Pendel is the key skill as it's the lowest cd pet generator and doesn't need a target to create pets and can make your life easier.

You can see barrold tests that deal a lot of damage but barrold tests are not a good indicator due to the 1 minute timers, Stun Spam, and stationary targets, so make sure to think about the skills you use and not just copy paste from barrold. In non barrold tests the skills you see them use won't be as useful.

I think her character sigils aren't a necessity but concord is good for debuff and Warpath can be used decently(I don't use it though as I focus more on maintaining stack than peak DPS on a stationary target). Harmony is onslaught focused so you don't need it.

Jump Slam Tank Ferry test, 1v1 vs Beelzebub