A kind soul pointed me toward a Reddit post detailing how to get around this. I have successfully done it and achieved my MMXIX title. As long as you still have any weekly bounty to receive a powerful headpiece from Drifter, you should be able to get it. For example, if you have tier 1 sentry headpiece already, then you simply need to go into tier 2 reckoning and wager middling sentry motes and you WILL get a tier 2 sentry headpiece to drop eventually. I got it as soon as I got the other pieces in the set. Then you can complete the powerful bounty like normal for the tier 3 helmet. If you don't have tier 1 headpiece for any other roles, then you simply load up reckoning tier 1 and wager weak motes until you get the headpiece, then continue on to the next step. Bungie should really have made these steps clear and it seems like a lot of people on the forums downvote these suggestions. Good luck! P.S. It should be noted this only works because you already have the powerful synthesizer and you have already unlocked a tier 2 headpiece for one role.
Ok so here's what I need to know. My friend did a bounty and got the Outlaw Reaper Helmet. Could he use synths to get an Outlaw Helmet for a different role like Sentry, and then do the Sentry bounty for the Notorious?
Yes he could. If he doesn't have any other classes helmets, he needs to load up tier 1 reckoning and wager weak sentry motes for example until the illicit sentry helmet drops. Then he needs to go to tier 2 reckoning and wager middling sentry motes until outlawed sentry helmet drops. Then do sentry bounty. If he already has another illicit helmet, just skip to tier 2 reckoning.
Thank you! This is good news, I almost thought we took too long to have him do it and he just couldn't get the seal.