The router speed setting should match the feeds and speeds for your selection of endmill and material. For #201 endmills in a Shapeoko and #102 endmills in a Nomad please see:
(there’s a row matching dial settings to RPMs at the bottom)
There’s an interactive version at: https://public.tableau.com/profile/willadams#!/vizhome/Carbide3DCNCFeedsandSpeeds/Sheet1?publish=yes
Note that the feeds and speeds calculations in Carbide Create were updated for trim routers in 433 and 440 and later use a curated set of feeds and speeds which are stored in CSV files.
See Intro to CNC - Part 5: Feeds & Speeds - YouTube for concepts on this and see the series #MaterialMonday: #MaterialMonday on YouTube for specifics.
You should test feeds and speeds in a piece of scrap using the technique at: https://precisebits.com/tutorials/calibrating_feeds_n_speeds.htm
Another consideration is Climb vs. Conventional Milling and tooling engagement — where possible avoid slotting and add geometry and cut as a pocket (Making vacuum hose adapters and/or Adding geometry to cut as a pocket with a finishing pass ) and consider leaving a roughing clearance and taking a finishing pass.
Extensive discussion at: Origin/consistency of chipload recommendations and Feeds & speeds - Shapeoko CNC A to Z with a spreadsheet for this at: Speeds, Feeds, Power, and Force (SFPF) Calculator - #29 by gmack