So as I was asked in another thread, I decided to write a guide for Rogue/Lock in 2v2 arena.
Personally I ran this comp to gladiator in s3 and s4 (finished 2nd in battlegroup ) and I must say it is incredible fun to play.
It is, of course, a 2 DPS combo, but not as popular as Rogue/Mage is nowadays.
In my opinion it is by far the strongest of the 2 DPS combos and, if played perfectly, doesnt have too much counter-comps.
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1. Specs & Gear
1.1 Speccs:
As for speccs I would highly recommend Shadowstep for the rogue and SL/SL for the Lock, altough affliction can be ok also if you play it well.
Rogue: 20/0/41
Warlock: 27/34/0
1.2 Gear:
Rogue:
If your rogue has PvE gear (has to be atleast sunwell niveau to be worth it), you CAN go for it but personally I feel like getting focused more and more often as a rogue recently, so I stick with full arena gear.
The rogue should gem for full DPS (=16 AP or 8 Agility Gems, your choice), for orange sockets I prefer 4AP/8crit but of course you can put in 16AP and loose the socket bonus wich isnt really essential nevertheless.
As meta I use the +24 AP and movement speed increase, but this is really personally favour.
Warlock:
I would recommend going for max health and resilence, since you're going to be focused 90% of the fights.
Stack Stamina gems and use the +18Stamina 5% stun resist meta.
Battlemaster trinket is ABSOLUTELY NECESSARY! especially against other 2DPS, without it your Lock is just going to drop too quickly.
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2. General Information
Rogue/Lock is all about getting an enemy use his trinket and then chain cc'ing him.
Rogue should use Wound/crippling poison, in the upper brackets a second offhand with mind numbing to shiv is really helpfull too.
CC chain mostly looks somewhat like this (it is of course situation variable):
DC-Fear-Fear (most likely a trinket here)-Blind-Sap-Fear-Fear
You see, if you get the enemy use his trinket you have about 30-40 secs CC if done correctly, which is of course enough to kill the cc'd person's partner.