Gamerules:
/gamerule playerPanic true/false - This game rule allows you to disable the Panic effect. The default is true.
/gamerule deathAngelSoundDelay 600 - This allows you to change how frequently the Death Angels make an idle sound. The default is 600 ticks (30 seconds).
/gamerule deathAngelRange 2000 - This allows you to change the range that the Death Angels can detect blocks with the value being in blocks. 2000 is the default value
/gamerule deathAngelFungusSpread true/false - This game rule allows you to enable or disable the spread of fungus within the world. The default is true.
/gamerule allowmeteorspawn true/false - enable or disable meteor spawns
/gamerule deathAngelSpawnSpread 2000 - controls how close death angels can spawn next to each other (only has an effect on natural spawning)
/gamerule deathAngelAlert true/false - change if only the nearest death angel will come to the sound or all in the area
/gamerule meteorSpawnRate 12.000 - set the time between meteor strikes [20 = 1 Second]
/gamerule doMeteorFlash true/false - enable or disable the meteor flash effect
/gamerule adminDeathAngelAlert true/false - players that are set with a command get a message when a death angel is alerted and who alertet them
/gamerule chatAlertCooldown 80 - the cooldown of the chat alerts when a death angel is alerted
[in ticks 20=1 Second]
Commands:
/kill-death-angels - Does what it says on the tin, kills all death angels and removes them from your world. May help if you’re experiencing lag.
/fungus-spread-rate 0.0-30.0 - Increases or decreases the spread rate of fungus in your world. Default value is 10
/reset-world-time - Resets the world time (e.g. the one found on your radar).
/set-meteor-spawn 0.0 - Sets a delay on the spawn of meteors in your world. Default is 0 and assume value is ticks.
/resetcooldown - Resets the meteor cooldown to its default (0.0)
/set-stage 0-3 - Sets the next stage ranging from 1-3. I don't know what the stages do as of now.
/set-alerteble true/false - Sets the death angel message alerts to true or false for yourself
/set-death-Angel-Kills 0.. - sets the world count of how many creatures the death angels have killed
/show-direction - gives you the number of pitch and yaw of yourself