namespace :admin do
  mount AdminSettings::Engine => "/"
  mount AdminProfile::Engine => "/"
end

# admin_settings/config/routes.rb
AdminSettings::Engine.routes.draw do
  resources :settings
end

# admin_profile/config/routes.rb
AdminProfile::Engine.routes.draw do
  resources :profile
end

# then you could access
# /admin/profiles
# /admin/settings