My personal experience is that I could often take out one orc warrior before they get into melee range, two if I got lucky. Because you’re firing 24 bolts and one of them is bound to crit. And having one less orc warrior to deal with is a big boon. You don’t wanna play cha-cha with such dangerous enemies in melee. When they get close just go all out on the offensive. Whack them with big two handed weapons.
They are too accurate and do too much damage for you to prolong the battle. Don’t even bring a shield to this fight. Bring 12 billhooks. Some brothers will die, but that’s what happens when you go up against 10 orcs.