Outside of an html "hack" there is no way to edit using Visual Editor on arbcom-en wiki. Could this option (in a similar manner to the option on enwiki) be enabled? I am doing this with the support (if sometimes mockery) of the other editors/Arbs.
Hmm, so https://arbcom-en.wikipedia.org/Special:Preferences#mw-prefsection-editing shows no VE option at all? Looking at the VisualEditor section of https://noc.wikimedia.org/conf/InitialiseSettings.php.txt I don't see arbcom mentioned so IIUC arbcom-en should have the default settings of VE being enabled.
What exactly does this request ask for ("Expected results")? To display a VE option under Special:Preferences#mw-prefsection-editing ?
Looking at the configuration, visual editor should be available as a beta feature on your wiki. Can you check if it's there? (I can't access the wiki myself.)
We could make it opt-out instead of opt-in, if you wish. (Remove it from visualeditor-nondefault dblist.)
If you have it enabled in preferences and it's not showing up, perhaps the problem is with the namespaces that it's enabled in? By default, visual editor only appears in the main namespace and in User, File, Help, and Category. Maybe it needs to be enabled in Project namespace or something? (Using wmgVisualEditorAvailableNamespaces.)