Heroic is the best, hands down. Because bad dice variance, say rolling 4 blank green dice, can have huge game swings. Resistance can be effectively immune to the depredations of bad dice variance. People who think Heroic is bad are genuinely foolish.
Selfless is very strong in 4&5 ship lists, arguably the strongest, because damage spreading can have huge impacts on half points/ keeping a ship alive another turn. Biggs as faction identity? Yeah.
Fearless can be ok. Great even on Fangs. Can be critical in those ‘need to go for the kill’ moments.
Ruthless? Which one of you jokers said Ruthless was anything above pure trash? Nearly completely unplayable, it needs jamming beam pricing.
The rest are ok to good, if situational/ tricky to trigger.