Bandits Insignia VS DMC:DFollow

I've started gearing up my rogue now for some pvp. I recently picked up Darkmoon Card: Death for a nice deal. Its proc is fairly predictable when using it in burst situations, and can crit for 3.5-4k when lucky. However I'm considering farming Bandit's Insignia, similar effect with passive attack power bonus instead of the crit. However the tooltip reads that the scale of dmg from Bandits is larger than DMC:D 1.5-2.25k, compared to the 1.75-2.25k of the card. This makes me think the DMC:D will do more damage on average than Bandits, however DMC:D is shadow damage, whereas Insigia is arcane which most classes don't have any defenses against.

tl;dr

Should I use Darkmoon Card: Death which I already have, or put in the effort to farm Bandits Insigia. And which is better.

Bandits for the reasons you and Banatu said. There isn't much arcane resist (DMC regularly resists 25%dmg on Priest teams), and AP is better than crit especially in double dps.