It is always mustahab to perform wajib prayers in congregation. There are many traditions that emphasise on Jama'ah prayers, and how multiplied the reward will be when conducted in congregation.
With the absence of a qualified religious scholar, there will still be a virtue of Jama'ah prayer. In brief, the person who leads should be known for his piety, and also have knowledge of the rulings of prayer.
And Allah knows best.