I agree that the cast time of Lunatic Voice is fast. After 3 Shield Bash she becomes immune to Stun. As soon as I see her pop Lunatic Voice I hit Spirits Within, but this only seems to hit her about 50% of the time before Voice.

Siren isn't just a healer check, its a PT check. DPS needs to down the zombies quickly so the Healer and Tanks don't get grabbed. Healer needs to keep HP top off and Tanks need to watch for Lunatic Voice and avoid getting grabbed.

I had one DF run where the healer kept arguing with all the DPS and basically said flat out "I dont need to move around the room to avoid the zombies, you should be killing them faster" and pretty much didn't move from one spot the entire fight. Even after every wipe, the healer still would not move to dodge. I had to help pick up healing while tanking. We got through it eventually, but it wasnt a fun experience.

Other than that I rather enjoy running Pharos. Especially when I get newbies and I don't mean that sarcastically.