-no dps proccing gear - can use however allows to to lay down your debuffs priar to the first wave of stuns and dps( yes i still use my int hex dolls ;0 )
Proc's actually land prior to the mez landing, so just don't use any proc's that apply dot's and you're fine.
What do you mean, wait 25 minutes?
I know it's possible to zone in and out until you see the first named spawn, but I didn't have to wait any extra time to do that. Or are you talking about something different?
There are 5 named mobs in chelsith that when the zone is created, two of them are up.
Krel'Vhap the Defeater (1st right)
Bbal'Gaz the Enthraller (2nd right)
Kuom'Ziki the Prevailer (3rd)
Uth'Gak the Grand Devotor (1st left)
Gok'Chai the Substantiator (2nd left)
You can zone in and run around the outside of the zone to see which ones are up, they have fairly long range echo's so you just have to run near their spawn area to hear them.
If the mob you're after isn't up you can zone out as long as you haven't killed anything, and wait for the 30 min timer that started when you zoned in to expire. That clears the zone and you can zone back in.
Best items, in my opinion are from the enthraller:
\aITEM 1921462031 168445287:Will-bender of Drudhi-kha\/a
\aITEM 1459643299 -1322474953:Coil of Vile Spawn\/a
\aITEM 1636191684 -627509994:Raging Leviathan Girdle\/a
The prevailer:
\aITEM 888430210 -107059330:Prime Clasp of Sustenance\/a
And the substantiator:
\aITEM -620169597 -193212380:Unailing Shoulderpads of Zeng'Tcho\/a
\aITEM 1166106249 773548188:Yha-lei Symbiotic Choker\/a
All of the mobs drop master's as well, and the blue baron I've seen drop two several times. The baron and the mucus also have items worth selling.