Starting my new Enchanter - couple of questions

[Annona]

1) Lull, Soothe, Calm and Pacify, not sure I understand the difference? Amount of mana used and radius of agro reduction?

2) Debuff lines such as Enfeeblement/Disempower and Weaken/Ebbing Strength stack reduction in strength?

3) All AOE stuns can hit and effect you as well, color Flux, Mes, color shift and color skew?

4) Other classes can buff your pets, charmed or animation pets?

5) Augmentation stack with the haste line of spells: Quick, Alacrity, Celerity, SLTW?

6) What is the difference between the debuff lines of spells up till Pillage Enchantments? Is just the amount of buffs or time removed from buffs increases?

Thanks!