How bad is your flare?
6mp takes 3 months to work and requires routine blood draws as long as you're on it. It's a simple pill you swallow, generic and inexpensive.
Humira works in 6 weeks or less. No blood draws for it. Humira has a patient copay assistance program, highly recommended if you do go on it. https://www.humira.com/humira-complete/cost-and-copay
Humira is a bit safer in this CORVID19 thing.
I'm on remicade (sister med to humira) and 6mp simultaneously.