Sorry to hear you can't make it, let me know if the situation changes.
The army loos prety good; low armour but elite fight skills with lots of range weapons. The way you described using it sounds very good, although if you do end up making it to this tournament you might want to consider Treebeard instead of Legolas as the leader; both are survivable heroes, but we're using a Heroic Experience Chart and combat monster treebeard benefits more from earning an extra Might or Fate point.
The list does lack speed, but that's only really important in 1 scenario, and since you get to place 2 objectives you can just put them near the central one and have the elves casually stroll over to them while firing bows
Radagast can buy a 5pt Sebastian upgrade, if you can manage to find the points.