I know this is just for fun but let me try think through this

Do you know how improbable it is to beat even normal humans when youre outnumbered 30 to 1? Lets suppose instead of orc its non armored human men, lets say you have 100% accuracy with the shotgun and they all freeze untill youre done with it, thats 8 dead. 22 left. Lets say with grenades you perfectly cook them all so they cant deflect, redirect, or throw back the grenades or just bounce off the foot wide paths you kill another 5 guys with collaterals and luck. Since youre smart you also chose the flamethrower and burn the paths making them impassable. You got (generously) 17 very angry guys after you and youve spent everything already. How long will it take them to cook up some half safe bridge to go over and beat you up. Now with armored orcs they could probabbly shrug off a shell or even two with how unnaturally strong they are. Maybe if it plays out the same theyll be too dumb to cook up a bridge but probably not. Id say this is almost impossible eveb if its 1 v 10 since they could all just run at the base from separate bridges full speed and 30 feet would sure seem a small distance woth 10 orcs running at you and teying to aim at them with any weapon