Picking a direction for F# with Xamarin Forms

I really like working with F#, especially given that I'm using Swift in pure iOS projects.

It's relatively early for my main project so I can pick a direction and wondered if the community had advice:

1. Go with traditional XAML and C# for the UI with F# relegated to background processing.
2. Use pure F# and define the UI in code, something I've recently experimented with successfully.
3. Use the XamlTypeProvider which is a bit neglected and behind (ver.0.1.7 for Xamarin.Forms.1.2.1.6229) or is this just needed to manipulate XAML?
4. Adapt the current WPF FsXaml

I've used XAML quite a bit in WPF and am fairly comfortable with using it but F# does seem leaner.

My biggest concern is probably robustness with programmer time coming closely behind ;-)

thanks

Andy