I've been following your posts here and love what you've done so far. It's helped me confirm my experiences and I'd thought I would share a few with you in return.

3 box 2 Sorc + Dok

1. rank 11 in a few hours with lite pvp and extra exploring on 3 pcs using HKN. I have already played 2 sorcs up to 21 in PW+ but got a new box so started 2 new ones and a healer.

2. I started out with just assisting the DK and nuking but once i got surging pain it became aoe fest with the DK pulling everything and healing himself then the sorcs chain nuke while the DK keeps them up. packs of mobs die after the 4th or 5th round of instant nuking. if you have lots of dark magic the crits make the packs go even faster but you have to watch out for the spike damage and try to keep your instant morale heal for spikes.

3. by level 11 i was pulling as many as 15 level 9-11 mobs at once, the xp was split 3 ways but the loot was sizeable. public quests start requiring 100+ kills and a this setup let me blow thru those steps very fast even if i was the only person working on the quests. the DK was able to mostly tank any bosses to this point cause the sorcs can burn them down fast. with just alittle more dps its very easy. i would love 5 sorcs and maybe shaman or DK

4. bright mages are the mirror of sorcs it might be worth your time to test em out. respawn rates are pretty wild now im not sure if thats gonna be the case in open or not.

good luck!