"I'll appreciate it if you'll be able to take out the soldier once I do this. It might be foolhardy, what I'm about to do, but I noticed that these archers are really heavily armored..."
"I don't know if I can kill him but I'll definitely weaken him!" Belros responded before getting behind the man and throwing a pair of knives at the soldier. It's obvious that a couple of knives won't kill a man who's that armored, but if anything it'll make him an easier kill for someone else take.
Move to K11 and throw some Iron Knives at the Soldier.