Poetics & Roulette Rewards

[Rongway]

However, once all available jobs are 90, there is no way to gain standard poetics via many of the roulette options.

All roulettes that serve old cap level content reward poetics, most of them outright. The only two that don't reward them outright are DR:Trials and DR:Mentor, but you will still receive poetics if they assign you to old cap level content.