It's easy to access the parapets above that courtyard as soon as you get there, just walk past the goblin chick that is loving on Volo's erratic performance and climb the ladder and head left. You will eventually get up to where several gobbos and bugbears are napping. For me, Astarion almost singlehandedly dispatched them all from stealth while they slept, with only the bugbears snapping awake in time to get off a hit or two before succumbing. Loot them and check the walls for a hidden way to access the interior of the Shattered Sanctum!
Or before (or better after) doing that, just launch some explosives stuff down onto those below to whittle them down to size and then snipe the survivors until they are all dead and then proceed into the sanctum. Hopefully you already cleared out the early gate area where you were challenged when entering their camp?
Last edited by Capt.Wells; 26/01/21 05:24 PM.