WoW - Comments on Warlocks and Priests

Well, recently I played an Undead Warlock Affliction-spec (currently level 22 with VoidWalker) on WoWscape, and I must admit, it has some mixed comments between the good and the bad.

Pros of being a Warlock:
- Multi-affliction that can kill a mob quickly (CoA + Corrupt + Immo)
- Having pets along can speed up the process, and sometimes allows you to let your pets do the aggro.
- If done correctly, most Warlocks can solo.

Cons of being a Warlock:
- Low HP, unless you use Imp as your pet to increase HP.
- Low DEF, so survivability rate is low.
- Easy to get PKed.

And the talents:

Affliction comments:
This talent allows you to cast any Affliction skills quicker, and more painful to the mob. So, if you want a fast kill, this is a good build for you.

Demonology comments:
This one allows you to have stronger pets, so if you rely on pets, then this talent build is a nice choice.

Destruction comments:
This talent increases your DPS damage, just like Affliction.

Recommended pets:
Imp - if you want a higher HP for better survivability.
Voidwalker - for mob control, since this pet has high HP and DEF.
Succubus - again, for mob control, but not as good as Voidwalker.

PvP attacking pattern:
Immo > Corrupt > CoW > SePa > CoA when opponent is dying

As for my main, I'm having a level 36 Draneii Priest with Shadow-spec currently in Desolace.

Pros of being a Priest:
- Highly needed in raids/parties.
- High HP with Power Word : Fortitude
- If you are Shadow-spec, you can actually solo most of the times, although healing is still a good need in parties.

Cons of being a Priest:
- Not so strong in DPS.
- Easy loss to Paladins and Warriors unless you manage your Physic Scream timing well.

For the talents:
Discipline comments:
- It allows you to have better DEF and HP, so for high survivability rate, this is good for you.

Holy comments:
- It lets you heal at a higher rate, very highly needed in parties and raids. Your Holy Spell damage also increases.

Shadow comments:
- It strengthens your Shadow magic and gains access to Shadowform, allowing you to solo more often.

My PvP attack pattern : Holy Fire > Mind Blast > SWP > PhyScr > Heal + PWS > Mind Flay > Mind Blast (repeat heal + hit)