Mentor Roulette bugged?

[Rongway]

Edit: looking at your character sheet on the Lodestone shows that you have not completed the “More than Fear” achievement (range -magical dps job quest) . So, it looks like you do not have battle mentor status yet. Complete that achievement and go talk to the Smith.

Any one of the three DD role quests count for mentor status. You don't have to do all three. They did one of the other ones.

the roulette will appear but it may be locked.

If you are missing any dungeon to unlock it, it will then tell you

The roulette is supposed to be visible but locked, with a list of missing duties; but there's a current known issue with patch 6.5 wherein the locked roulette is invisible until they fix it.

yupyupyup, all checked. Must've gone over the full duty list 8 times by now

If you have combat mentor status, then you must be missing an optional duty somewhere. Asari listed the easiest ones to miss. You have the achievements for Odin and a Manderville weapon. Your achievements list says you have not completed any ARR relics, so check again for A Relic Reborn: the Chimera and A Relic Reborn: the Hydra. I'll highlight those in red above so you can easily see their order in the list.