@Captain_C0ld there are not many options to choose from. New API works more like a web application, eg. Gmail. You can’t login to different gmail accounts from the same browser at the same time. To check 100 gmails you need to login/logout 100 times or open 100 browser private mode windows (not tabs).
If I’m correct every account (character even) has a separate login/permission context in new API. It’s either EVEMon will work with 1 account/char or not work at all. Now choose!
PS. Playing 100 accounts is not practical. This way you don’t play at all. There’s a finite number of chars (not accounts) you can reasonably “play”. Even if they do PI it takes like 15 mins to do something useful on them (not including switching chars and waiting for client to login for session). 100 accounts x 3 chars x 15 mins = 4500 mins / 60 mins = 75 hours
You’ll need 3 days and 3 hours to “play” 300 chars for 15 mins. A little bit insane. I’ve heard someone runs 27 accounts = 81 chars. That’s already 20 hours of “playing” per day. 6h 40 mins a day if you check every char every 3rd day just for 15 mins.