Fellow nagisin main here. Loved reading the guide, thanks!
I will vouch for snake pit. It is an incredibly powerful physical dps setup. Hyena strike is beyond useless, can you believe that this oskill on a poison themed set does no poison damage?! Doesnt matter, this set's raw physical damage and deathstrike proc sets it far above all other early options. It is beaten by fryst eventually but not without great difficulty, I promise.
Like marco, I'm in love with ways nagisin but I got stuck at ZKT and didnt want to progress to black ice. I was so busy trying to create an infinite proc loop that I abandoned the ladder for my mad experiments on non ladder.