Am I the unluckiest person or the chances at AI works different?

I had similarly geared heroes when I did it a year back (R3 zB1, R3 zzAsajj, g12 on the rest) and yep, it was insanely frustrating. RNG prevailed in the end though, as there were several videos showing it was possible with what I had. The Crit Avoid arrows on the B2 and Magna helped, as did massively speeding up droideka. Everyone had their zetas but magna. It's pretty clear P4 was designed for relic levels on all the droids, so doing it with less is definitely a feat.