I couldn't try Hindus Longbowmen yet, but so far the Syrians do an awesome job. They have a lot of advantages over other archers, namely armour, range, numbers, and ammunition, in which they are all superior over every other archer. Cretans are a tad better when it comes to melee, you can use them almost as medium infantry if needed. The Syrians are also good in melee, although not excelling.