Navi, MUR, AoP and Prisoner are also doing a good job (30-40 sec normally).
No rare soul for me until now.
@ scott: I also had a MACLO. I think I would have reached exactly 1000 3* XP shards with the respective loot and thats the reason for the MACLO (old topic, still present). Did you have the errors in a row? I fear the badges are gone indeed