I honestly don't think they should because they are from two different areas and two different times. I mean, if you're talking conversation, I dunno. Yeah they lost their teammates and became the sole survivors but how they handled it themselves would be entirely different. While Eris is all about avenging her fallen comrades and wanting revenge from Crota and the Hive in general, Saladin has an entirely different approach. Sure, it was on the same line of wanting to avenge his comrades as well, but collecting their artifacts and all is a sign of remembrance and memory. A sign of closure and seeing what happened to them, while Eris is all "Kill them all because my comrades are dead! Yah!" Their stories are different, as are their reactions and no doubt they would clash with their opinions and points. Eris is all about vengeance while Saladin is all about honor and prosperity for the future of mankind. To be blunt as well, Saladin was at the tower for the Iron Banner. The only thing he cared about at that time was sharing a bit of history for the Iron Banner and seeing competition. He had no other interest than to talk to the Vanguards and Lord Shaxx. Why talk to some mad woman that happened to live in that pit for months, almost a year or more with Hive? Plus, she has three HIVE eyes! Creepy! Sure, I guess they can say, "I know what it feels like to lose comrades," but other than that, they wouldn't want to talk about their pasts with each other because it would be too painful, no matter. And no doubt if you brought it up with Eris she would go into an episode of madness and mutter rhymes and other things that wouldn't make sense. As collected as Eris is, she is also equally unstable and insane. For Saladin, he wouldn't want to surround himself with someone like that. Not Eris' fault, but it's how she turned out to be and from what I can tell, Saladin wouldn't want to talk or deal with her.