I’m running a heavily theory-crafted Gila. Before everyone rushes out and buys a Gila, based on the lossmails I’d wager very few players know how to fit and operate it in Abyssal space.
The right fit is key - as are skills, implants and drugs. I’ve beat the dreaded Trig spawns in F4 and F5 pockets on SiSi (but just barely). You can just as easily die from a simple mistake as you can survive through pure blind luck.
You really have to know your enemy and the tactics they adopt, as well as which Abyssal structures, defense and environments hinder or help you. A lot can actually be gleamed from simply reading through the SiSi test threads and the countless others players have been posting on.
I will say that the setup I arrived at was, how shall I say - “unique”. Many of us are understandably reluctant to post specific fits as we’re leery of CCP buffing the Abyssal pockets without warning.
Just don’t run an Ishtar. Your survival rate doubles if you choose any other hull.