I've been having decent success with this on ladder since I started toying around with it. The power base isnt perfect yet, because I dont have 2 undepleted power on turn 2 nearly as often as I want, but the threat base is lining up very well against the current metagame, and Display of Ambition is even more than it's already incredibly good ranking when all of its modes are useful, as opposed to just one or two. The Warhelm + Sharpshooter package pairs very well with the heavier charge component of the list, and Hideout pistol is a very good tool for gaining and keeping control of the game against opposing aggro and midrange decks now that they favor going tall over going wide.
This was originally a shell to try and make Stella, Shotcaller worth the slots, but baby Vara is just the stronger card.
If, like me, you want a faster take on the FJS warhelm deck that's gained some popularity, this is a fun competitive tribal variant to run. It feels, in many ways, like Winchest Highway.