Complex sentence: Mobye Narapati (,; Narapati III of Ava; 1516--15??) was the penultimate king of Ava who reigned from 1545 to 1551, as the disputed representative of the Confederation of Shan States that had ruled Ava since 1527.
Split into simpler sentences: Mobye Narapati (,; Narapati III of Ava) was the penultimate king of Ava who reigned from 1545 to 1551. The ethnically Shan king ruled as the disputed leader of the Confederation of Shan states that had ruled Ava since 1527.