Murmur health is full and he doesn't fight adds

even though in the code it says his health should be 0.3x what it normally is, it's not. but the same code works for Valeastrasz in Blackwing Lair

This disables the HP regeneration to the boss. The 40% of the full health is set by the SD3 script "boss_murmur" at reset, i.e. at spawn and evade.

On the staging battle. Many SD3 scripts are extremely primitive (Murmur is unlucky too), just like the simplest combat EventAI. It looks like the battle must be there, and it would be nice to have it. However, a full instance recovery requires a laborious work of the both sides, testers and dev(s), together. The game balance must be restored above all. For example, I wonder why the present Murmur lacks an enrage spell to be casted usually at ~10th (or whatever) minute of the battle.

Briefly, I'm not ready yet to create separate cosmetic patches for instance encounters. I consider it possible only since the substantial part of the encounters will be fixed.