saladin is selling my perfect roll of tinasha's mastery but i cannot get it because i wanted to gild my iron lord seal first week. big mistake. im never doing that again. i feel punished for playing yet again. i really wish bungie would address this because i really feel sad about all the time i spent in ib farming for the sidearm, only to not get the roll i wanted. and now i cant even buy the roll to ease my pain. this just sucks ...
Rank reward tracks should either have completely static rolls or just a randomised drop of the weapon. Rotating the rolls on the rank track makes actually playing less rewarding since you could end up in the situation you described, I logged on and played like 3-4 games of Iron Banner simply to get that one on his track and I will never touch IB anymore than I need to and if that roll never happened on rank 4 I was more than happy to not play IB and not get the sidearm.