I cringe whenever I start casting a mezz. announced or not, some asshat (often some icy hot rogue who thinks he's Captain Offtank) is quite often going to break it. This is usually the same person who cries for a haste several times after you tell him you're OOM.
I often root a freshly mezzed mob. If some douche breaks it, unless you're just unlucky and the root breaks immediately, too, you can usually get off a mem blur or they grab the hate.
I'd kill for an AoE root spell
[You must be logged in to view images. Log in or Register.] AoE mezz is often a death sentence when you're grouped with DPS-happy Mages, Wizards, and Druids. Drop an AoE mezz, then you see fire raining from the sky =/
LOADING. PLEASE WAIT...
I used to have a macro setup for my mezz spells, but I've found that most people don't really NEED to see what you're mezzing if it's explained to them beforehand to /assist the MT and leave everything else alone. Now, if your TANK keeps switching targets it's rather useful to announce the mezzes (or send him a tell to stop), so I have a seperate button for Mezz, Root, and occasionally Stun (stuns usally don't require an announcement imo).
I've done 3 Moggok runs on my inkie enchanter since lvl 8. Anytime I'm running to Highpass, I always kill bixies to see if I can get some honeycombs. If I'm in the Karanas, I try to make a trip to qeynos and Erudin for those parts of it (I keep an Innoruuk's Kiss of Death on me). This way I don't do it all in one sitting and still get one done every so often. It works for me, ymmv.
If the group lacks direction, don't be afraid to take over. Help people understand what you can do, what your job is, how well you can do it (usually by showing them) and how easily it is for them to mess it up. MOST people will fall into line or be willing to at least try and not break mezzes, etc. Politely send tells if you can to prolific breakers, try not to call people out in groupsay.
Your DD nuke spell has a stun component, and it will make things HATE YOUR F'ING GUTS. Use with caution in a group. DoT is a Dot and debuff, it causes HUGE agro. I generally spend most of my mana on crowd control and buffs, and sometimes slows and stuns (even the melee debuffs tend to piss things off majorly). Rarely will I ever cast a damage spell unless I am grouped with a tank capable of producing copious amounts of agro. Even then it's a luxury.