newb enchanter questions

[levitical]

a few questions from a newb enchanter

1. Is mez guarenteed to go full duration once it lands?

2. is there any kind of software out there to let you know when mez is about to wear off? (lvl 4 mez last 24 seconds so is there any kind of UI that would start a timer after it lands or do you just have to kinda time it in your head?

3. does re-mezzing become a non-issue after you get higher lvl mezzes that last longer?

4. it seems charm kiting at lower lvls is less efficient charm/keeping root/invis/then 2 nukes to finish them off for 2 mobs is more mana than just one DoT and nuke per mob with pet to get over 50% dmg (lvl 15) and full experience. is this just because i'm low lvl?

5. when 4 mobs are all RIGHT on top of each other and the tank is on one. is there a better way to target them than just "cycle through nearest npc button" more than once i have targetted a mob that wasn't even pulled using this method and mezzed him (thank god it memblurred to) because it didnt seem to cycle through the NEAREST target really like it should.

I know it's a long post any input i appreciate though. i know everyone hates crappy encanters!!