The other thing, which I said before is that fighting in the cave is no longer the better option because the first thing any Gnoll will do is hit the Alchemists Fire and destroy the ladder meaning you are just at the bottom of a hill, i.e. at disadvantage.
Note that if you are cornered at bottom of the hill ... there is a cliff, just behind you ... jump there and your disadvantage is gone ... run futher away, and you get advantage + gnolls loose at least one turn when they will dash to get to you.
In general it seems to me like AI is dashin unnnecesary often ... i mean in cases where ranged attack would make much more sence. :-/
Also NPC rangers almost every time used Hunter's Mark after the shot ... in my last Githyanki battle when there was last one, he even Hunter's Marked himself for some unknown reason.
