Don’t get me wrong the mission is hard and somewhat rng dependent. I mean there is nothing you can do if shaak gets overly targeted early and dies or fives dies instead of sacrificing (though obviously you can still win in the fives scenario). Yes there are a lot of ways for it to go south but more hp on shaak and fives and more damage on arc tend to mitigate this though not completely.
Once you meet the stat check (and once again thanks to all working with 50shardsofkam and similar bots) it’s a fairly straightforward encounter.
EDIT:
Finally, I don’t think this was a “fair” encounter when it was introduced. I think with the added years to farm mods and to relic characters plus the increased resource flow into the game it is fair now. I personally don’t want another encounter like it. Cause I like I said to me it was a stat check and an unfair one to the majority of players