I've done about 70 Roc Strikes and have never gotten an exotic from it. However, I did get a really nice Legendary Auto-Rifle by the name of Do-Gooder. I love it because the impact is decent, rate of fire at 90%, 29 rounds per clip, stability is great, accuracy builds the longer it is fired, AND the radar stays active even while aiming down the sights.(I can't even explain how useful radar while aimed is during chaotic cluster-blams!) So 0 exotics in about 70 Roc Strikes. And maybe 6 legendary items, 2 of which have been ships. (extinction event and the gardener) Also, I have collected many strange coins from the strikes which contributed to my Exotic chest piece (Voidfang Vestments) so I guess that counts for strike reward. It should also be noted that my luck with RNG is terrible. I have gotten 4 exotics since I started playing. The above stated Voidfang vestments, a titan helmet(I dont have a titan), and TWO accounts of the No Land Beyond sniper rifle which is the equivalent of Mr. Hankey the Christmas poo without his hat and mittens. .. I mean, it's a sniper rifle with no scope and it's main perk is that you can equip it in the primary weapon slot. It's more of a hindrance than anything. I guess if I need an exotic shard I can just scrap 'em.