what determines where subweapon chests spawn? I've updated to 1.8.4 and played a few megawads as Kustam and Blaz, but so far I've never found a chest except that one time it replaced a backpack but didn't contain any subweapons. I tried to "force" a random one to spawn by using "summon spidermastermind" about 30 times, but when each one died there was just a bunch of ammo but no chests.
also what is "Sentinel" for Kustam? I can't figure out how to use it, the gun bar eventually fills to 100 but even the "unleasher" key doesn't use it?