optimizing raven inigo?

I dunno if it's "better" but why not just go with Bowbreaker? Inigo should have more than enough speed to double Reinhardt.

Bowbreaker is the most reliable, I think. If you want, use noontime so that he grabs a little extra bulk whenever he needs to take them both. The breaker lets him double B.Lyn always, and Reinhardt will get doubled naturally. Healing can help him make sure the breaker is still good if Reinhardt hits unusually hard and comes charging in first.