You might save some money looking at other part d plans they are not all the same.
Check out Cigna.
You will be in catastrophic coverage at about $3k of total Rx costs. Then I think you only pay 5%. You should max out your out of pocket expense at around $4-5k/yr.
You can go online to medicare.gov plug in your meds and it will do plan comparisons for you.
FYI infusions like [wiki2="Remicade"]Remicade[/wiki2] and entyvio are covered under part b and if you have the medicare supplemental plan f you pay nada, zilch for those.