To save you from having to find out the hard way here are my personal guidelines for charming:
1) Dont aim too high. Better charm something in the lower blue area if you want to keep it for a while. Additionally, if such a pet breaks, it will prolly not kill you so fast.
2) How to charm:
a) Always buff yourself with your charisma buff. Generally get high charisma.
b) Mez (ALWAYS use level 4 spell with short duration)
c) Tash (if somebody can cast malo line, thats a plus)
d) Charm
e) Park pet a few meters away. When it breaks it gives you a bit more time to react.
24 seconds after b) you got your new pet
About pet haste: If you got a very low blue or even green pet, haste really cant hurt much. I usually only use augment on pets, need mana for recharms and CC in a group. Better charm something a bit lower and haste instead of a bit higher without haste. Same damage but way longer charm duration.
And one other advice for chanters level 16+. Always buff your own MR. It's really nice when puller brings mobs too close and you already started your AE mez to resist your own mez
[You must be logged in to view images. Log in or Register.] Self mez sux.