Sir Luthien:
Sir Luthien has but one goal: rescuing the downed man. He does what's necessary to pull him out of the line of fire.
He's already well out of danger. Both Wonnilion and Kalador are moving past him this round and three out of four of the enemy have been turned and fled. The last one is currently in melee with Ronalt (paralysed) and Luthien. Wonnilion and Kalador are coming up to flank them.
Sir Luthien could move around to Amathaon, but that would mean he's leaving melee and will be subject to a full rounds worth of attacks (two claws and a bite) at +4 to hit (just like the party got on the three who just fled).