Time to slow down on posting now that I got max level on Rift Ripper in Expeditions
Overall it's not really worth anyones time but for those that do want to waste their time, Rift Ripper is the only class worthwhile. 6 second cd shards that chunk enemies for 1k a volley is insane and her AOE skill that basically says "fuck you die" to groups is even more insane. Not to mention everything she does heals her and her team so she's not even a glass cannon. Just a cannon. She also only gets slightly beat out in mobility by Shadow caller but both classes require knowledge on how to reach max speed so its comes down to who knows their character more.
Shadow caller is the class for shitters (the target audience) and the Hunter would be good if you had a group going but with the average pub lobby its not worth trading away your dps for better overall team damage in optimal scenarios.
Both dps characters rely on cooldown reducing melees since they can hit a guaranteed crit with a plunge attack but Shadow Caller is stuck in the air like an asshole for most of her dps gameplay while Rift Ripper can continually abuse it while fitting in an aimed gun volley to put out numbers no other class can reach right now. Rift Ripper can also one shot all structures survs are stuck under while Shadow Caller has to smack stuff with a dagger or hammer which is ungodly slower.

TLDR; Rift Ripper fucks, focus ability damage and cd reduction and you can finish every mission in 4-5 mins. Don't use Hunter.